Java Program to print multiplication table up to n numbers

//Program to print multiplication table up to n numbers
import java.util.*;
class mtable
     {
public static void main(String args[])
      {

    int n,m,i,k;
    System.out.println(" Up to which number you want to print tables:");
    Scanner obj=new Scanner(System.in);
    m=obj.nextInt();
    System.out.println("\n Tables upto "+m);
    for(n=1;n<=m;n++)
          {
        for(i=1;i<=10;i++)
         {
           System.out.println("\t"+n+" X "+i+" = "+n*i);
                }
               
         System.out.println("\n");        
         }
         
         
      }
    }

Java Program to print multiplication table of a given number.

//Program to print multiplication table of a given number.
import java.util.*;
class table
     {
public static void main(String args[])
      {

    int n,i;
    System.out.println(" Enter a number to find its multiplication table :");
    Scanner obj=new Scanner(System.in);
    n=obj.nextInt();
    System.out.println("Table of "+n);
    for(i=1;i<=10;i++)
       {
          System.out.println("\t"+n+" X "+i+" = "+n*i);
              }           
      System.out.println( );
      }
     }        

Java Program to sort a list of integers in ascending order

//Program to sort a list of integers in ascending order
import java.util.*;
class ascend
     {
public static void main(String args[])
      {

    int n,i,j,temp;
    int a[]=new int[50];
    System.out.println(" How many numbers you want to sort in Ascending order:");
    Scanner obj=new Scanner(System.in);
    n=obj.nextInt();
    System.out.println(" Enter elements");
    for(i=0;i<n;i++)
        {
        a[i]=obj.nextInt();
        }
    System.out.println(" unsorted array : ");
    for(i=0;i<n;i++)
          {
        System.out.print("\t "+a[i]);
          }
    for(i=0;i<n;i++)
      {
        for(j=0;j<n;j++)
         {
        if(a[j]>a[j+1])
          {
            temp=a[j];
           a[j]=a[j+1];
           a[j+1]=temp;
          }
         }
      }
    System.out.println("\n sorted array in ascending order ");
    for(i=0;i<n;i++)
          {
        System.out.print("\t "+a[i]);
          }
     System.out.println( );
      }
    }

Java Program to sort a list of integers in descending order

//Program to sort a list of integers in descending order
import java.util.*;
class descend
     {
public static void main(String args[])
      {

    int n,i,j,temp;
    int a[]=new int[50];
    System.out.println(" How many numbers you want to sort in descending order:");
    Scanner obj=new Scanner(System.in);
    n=obj.nextInt();
    System.out.println(" Enter elements");
    for(i=0;i<n;i++)
        {
        a[i]=obj.nextInt();
        }
    System.out.println(" unsorted array : ");
    for(i=0;i<n;i++)
          {
        System.out.print("\t "+a[i]);
          }
    for(i=0;i<n;i++)
      {
        for(j=0;j<n;j++)
         {
        if(a[j]<a[j+1])
          {
            temp=a[j];
           a[j]=a[j+1];
           a[j+1]=temp;
          }
         }
      }
    System.out.println("\n sorted array in descending order ");
    for(i=0;i<n;i++)
          {
        System.out.print("\t "+a[i]);
          }
     System.out.println( );
      }
    }

C++ Program to find average of n numbers

//Program to find average of n numbers
#include<iostream>
using namespace std;
int main()
{
    int n,i,a[100];
    float avg,sum=0;
    cout<<"\n Of how many number you want to find average:";
    cin>>n;
        cout<<"\n Enter numbers:"<<endl;
        for(i=0;i<n;i++)
         {
           cin>>a[i];
         }
        for(i=0;i<n;i++)
         {
           sum=sum+a[i];
         }
    avg=sum/n;
    cout<<"\n Average of "<<n<<" numbers is :"<<avg<<endl;
return 0;
}

C++ Program to check a given numbers is positive,negative (or) zero

//Program to check a given numbers is positive,negative (or) zero
#include<iostream>
using namespace std;
int main()
{
    int n;
    cout<<"\n Enter a number:";
    cin>>n;
    if(n<0)
        cout<<"\n Entered number is negative "<<endl;
    else if(n==0)
        cout<<"\n Entered number is Zero "<<endl;
    else
        cout<<"\n Entered number is positive"<<endl;
return 0;
}

Java Program to calculate the discriminant of quadratic equation

//Program to calculate the discriminant of quadratic equation
import java.util.*;
class quadratic
    {
  public static void main(String args[] )
      {
        double a,b,c,k;
        Scanner obj=new Scanner(System.in);
        System.out.println("Enter Co-efficients value");
        a=obj.nextDouble();
        b=obj.nextDouble();
        c=obj.nextDouble;
        k=b*b-4*a*c;
    if(k<0)
        System.out.println("\n It has no real solutions");
    else if(k>0)
        System.out.println("\n It has two real solutions");
    else
        System.out.println("\n It has one real solution");
      }
    }

Java Program to multiply two matrices

 //Program to multiply two matrices
import java.util.*;
class matrixmul
    {
  public static void main(String args[] )
      { 
         int m,n,p,q,i,j,k;
         int [][]a =new int[10][10];
         int [][]b=new int[10][10];
         int [][]c=new int[10][10]; 
        Scanner obj=new Scanner(System.in);
        System.out.println("Enter row and column of 1st matrix");
        m=obj.nextInt();
        n=obj.nextInt();
        System.out.println("Enter row and column of 2nd matrix");
        p=obj.nextInt();
        q=obj.nextInt();
        if(n!=p)
             System.out.println("Matrix multiplication is not possible");
        else
             System.out.println("Enter 1st matrix");//reading 1st matrix
          for(i=0;i<m;i++)
           {
             for(j=0;j<n;j++)
                {
                   a[i][j]=obj.nextInt();
                }
           }   
            System.out.println("Enter 2nd matrix");//reading 2nd matrix
          for(i=0;i<p;i++)
           {
             for(j=0;j<q;j++)
                {
                   b[i][j]=obj.nextInt();
                }
           }
           System.out.println("\t 1st matrix is : \n ");//printing 1st matrix
          for(i=0;i<m;i++)
           {
               if(i==m-1)
                      { 
                        System.out.println(" ");  
                      }   
             for(j=0;j<n;j++)
                {
                   
                   System.out.print(" \t "+a[i][j]);
                }
           }   
                System.out.println("\n\t 2nd matrix is : \n");//Printing 2nd matrix
          for(i=0;i<p;i++)
           {
               if(i==p-1)
                      { 
                        System.out.println(" ");  
                       }   
             for(j=0;j<q;j++)
                {
                   
                   System.out.print(" \t "+b[i][j]);
                } 
           }
           System.out.println("\n Product of 1st and 2nd matrix :");//multiplying the matrices
            for(i=0;i<m;i++)
               {
                 for(j=0;j<q;j++)
                   { 
                         for(k=0;k<p;k++)
                       {
                          c[i][j]=a[i][k]*b[k][j]+c[i][j];
                       }
                   }
               }
               for(i=0;i<m;i++)//printing resultant matrix
               {
                   if(i==m-1)
                      { 
                        System.out.println(" ");  
                       }
                 for(j=0;j<q;j++)
                   {
                       System.out.print("\t "+c[i][j]);
                   }
               }
               
      }
    } 

Java Program to find sum of digits of a given number

//Program to find sum of digits of a given number
import java.util.*;
class sumofd
     {
public static void main(String args[])
      {

    int a,r,num,sum=0;
    System.out.println(" Enter a number:");
    Scanner obj=new Scanner(System.in);
    a=obj.nextInt();
    if(a<0)
         num=-a;
    else
         num=a;
    while(num>0)
             {
        r=num%10;
        sum=sum+r;
        num=num/10;
         }
    if(a<0)   
          System.out.println(" sum of digits = -"+sum);
    else
          System.out.println(" sum of digits = "+sum);
     }
   }

Java Program to find a given number is even (or) odd.

// Program to find a given number is even (or) odd.
import java.util.*;
class evenodd
     {
public static void main(String args[])
      {
    int n,i,is_even=0;
    System.out.println(" Enter a number : ");
    Scanner obj=new Scanner(System.in);
    n=obj.nextInt();
    for(i=2;i<n;i++)
         {
        if(n%2==0)
        is_even=1;
         }
    if(is_even==1)
        System.out.println(n+" is an even ");
    else
        System.out.println(n+" is an odd ");
    }
  }

Java Program to calculate cube(^3) of a given number

//Program to calculate cube(^3) of a given number
import java.util.*;
class cube
     {
public static void main(String args[])
      {
    int n,cube;
    System.out.println("\n Enter a number to find its cube:");
    Scanner obj=new Scanner(System.in);
    n=obj.nextInt();
    cube=n*n*n;
    System.out.println("\n\t"+n+" ^ 3 = "+cube);
    System.out.println();
     }
    }

Java Program to find a given number is Composite (or) not.

//Program to find a given number is Composite (or) not.
import java.util.*;
class composite
    {
public static void main(String args[])
      {
    int a,i,count=0;
    System.out.println(" Enter a number:");
    Scanner obj=new Scanner(System.in);
    a=obj.nextInt();
    for(i=1;i<=a;i++)
        {
        if(a%i==0)
          count++;
         }
    if(count>2)
        System.out.println(a+" is a composite number ");
    else
        System.out.println(a+" is a not a composite number ");
     }
}

Java Program to check a given number is positive/negative/zero

//Program to check a given number is positive/negative/zero
import java.util.*;
class check
     {
public static void main(String args[])
      {

    int n;
    System.out.println(" Enter a number:");
    Scanner obj=new Scanner(System.in);
    n=obj.nextInt();
    if(n<0)
        System.out.println(" Entered number is negative ");
    else if(n==0)
        System.out.println(" Entered number is Zero ");
    else
        System.out.println(" Entered number is positive ");
      }
     }

Java Program to find average of n numbers

//Program to find average of n numbers
import java.util.*;
class areaofc
     {
public static void main(String args[])
      {

    int n,i;
    int a[]=new int[50];
    float avg,sum=0;
    System.out.println(" Of how many number you want to find average:");
    Scanner obj=new Scanner(System.in);
    n=obj.nextInt();
        System.out.println(" Enter numbers:");
        for(i=0;i<n;i++)
         {
           a[i]=obj.nextInt();
         }
        for(i=0;i<n;i++)
         {
           sum=sum+a[i];
         }
    avg=sum/n;
    System.out.println(" Average of "+n+" numbers is : "+avg);
      }
     }

Java Program to find area and perimeter of a rectangle

//Program to find area and perimeter of a rectangle
import java.util.*;
class areaofr
     {
public static void main(String args[])
      {

    int l,b,area;
    System.out.println(" enter  length of a rectangle :");
    Scanner obj=new Scanner(System.in);
    l=obj.nextInt();
    System.out.println(" Enter breadth/width of a rectangle :");
    b=obj.nextInt();
    System.out.println(" Area of a rectangle : "+l*b);
    System.out.println(" Perimeter of rectangle : "+2*(l+b));
      }
     }

Java Program to find area and perimeter of a square

//Program to find area and perimeter of a square
import java.util.*;
class areaofs
     {
public static void main(String args[])
      {
    int a,area;
    System.out.println(" Enter the side of a square :");
    Scanner obj=new Scanner(System.in);
    a=obj.nextInt();
    System.out.println(" Area of a square : "+a*a);
    System.out.println(" Perimeter of square : "+4*a);
      }
    }

Java Program to calculate area of circle using if-else statement

//Program to calculate area of circle using if-else statement
import java.util.*;
class areaofc
     {
public static void main(String args[])
      {
    float n,r,d,area;
    System.out.println(" You want to calculate area of circle using");
    System.out.println(" 1.Radius \n 2.Diameter");
    System.out.println(" Enter your choice:");
    Scanner obj=new Scanner(System.in);
    n=obj.nextFloat();
    if(n==1)
          {
        System.out.println(" Enter radius:");
        r=obj.nextFloat();       
        System.out.println(" Area of circle = "+3.14*2*r);
          }
       
    else if(n==2)
          {
        System.out.println(" Enter diameter:");
        d=obj.nextFloat();       
        System.out.println(" Area of circle = "+3.14*d);
          }
    else
        System.out.println(" Invalid choice ");
       }
     }
A similar program to this :
Java Program to calculate area of circle using SWITCH statement

Java Program to generate Fibonacci series

//Program to generate Fibonacci series
import java.util.*;
class fibonacci
     {
   public static void main(String args[])
      {
    int f1=1,f2=1,f3,n,i;
    System.out.print("Enter how many numbers you want to generate in the series : "); 
    Scanner obj = new Scanner(System.in);
    n=obj.nextInt();
    if(n==1)
      System.out.println(f1);
    else if(n==2)
       System.out.println(f1+" "+f2);
    else if(n>=3)
         {
        System.out.print(f1+" "+f2);
        for(i=3;i<=n;i++)
            {
            f3=f1+f2;
            f1=f2;
            f2=f3;
                System.out.print(" "+f3);
            }
         }
        }
      }
A similar program to this
Java Program to generate nth term in Fibonacci series

Java Program to find largest and smallest in a list of numbers

//Program to find largest and smallest in a list of numbers
import java.util.*;
class largesmall
     {
   public static void main(String args[])
      {
    int a []=new int[25];
    int n,i,large,small;
    System.out.println("How many numbers you want enter in the list");
    Scanner obj =new Scanner(System.in);
    n=obj.nextInt();
    System.out.println("Enter the integers :");
    for(i=0;i<n;i++)
      {
        a[i]=obj.nextInt();
          }
    large=a[0];
    small=a[0];
    for(i=0;i<n;i++)
      {
        if(large<a[i])
         large=a[i];
        else if(small>a[i])
        small=a[i];

          }
    System.out.println(" Large element : "+large);
    System.out.println(" Small element : "+small);
       }

      }

Java Program to print prime numbers between 1 and n

//Program to print prime numbers between 1 and n
import java.util.*;
class nprime
     {
   public static void main(String args[])
      {
    int n,i,j;
    int is_prime;
    Scanner obj = new Scanner(System.in);
    System.out.print(" Enter a number : "); 
    n=obj.nextInt();
    System.out.println("  Prime numbers between 1 and "+n+" are :");
    for(j=2;j<=n;j++)
      {   
        is_prime=1;
       for(i=2;i<j;i++)
         {
        if(j%i==0)
           is_prime=0;    
         }
   
    if(is_prime==1)
              System.out.print(" "+j+" ");
   
       }
      }
    }
Similar program(s):
C++ Program to find a given number is Prime (or) not.
C++ Program to print prime factors of given number

Java Program to check given number is prime (or) not

//Program to check given number is prime (or) not
import java.util.*;
class prime
     {
   public static void main(String args[])
      {
    int n,is_prime=1;
    System.out.print("Enter a number : "); 
    Scanner obj = new Scanner(System.in);
    n=obj.nextInt();
     for(int i=2;i<n;i++)
         {
        if(n%i==0)
           is_prime=0;    
         }
    if(is_prime==1)
              System.out.println("It is Prime");
    else
        System.out.println("It is NOT Prime");
    }
     }
Similar program(s):
C++ Program to print prime factors of given number
C++ Program to find prime number between 1 and n

C Program to print square(s) from 1 to n

//Program to print square(s) from 1 to n
#include<stdio.h>

int main()
{
    int n,i,square;
    printf("\n Enter up to which number you want to find square(s):");
    scanf("%d",&n);
    printf("\n Square value(s):");
    for(i=1;i<=n;i++)
        {
        square=i*i;
        printf("\n\t %d ^ 2 = %d",i,square);
        }
    printf("\n");
return 0;
}

C Program to find prime number between 1 and n

//Program to find prime number between 1 and n
#include<stdio.h>
int main()
{
 int n,m,i=2,is_prime=1;
 printf("Enter up to which number you want to find prime numbers:");
 scanf("%d",&m);
 for(n=2;n<=m;n++)
        {
      for(i=2;i<n;i++)
        {
             if(n%i==0)   
                   {
                   is_prime=0;
               break;
                    }
            else
             is_prime=1;
        }
        if(is_prime)
            printf(" %d  ",n);
    }
    printf("\n");
return 0;
}
       

C Program to print cube(s) from 1 to n

//Program to print cube(s) from 1 to n
#include<stdio.h>
int main()
{
    int n,i,cube;
    printf("\n Enter up to which number you want to find cube(s):");
    scanf("%d",&n);
    for(i=1;i<=n;i++)
       {
        cube=i*i*i;
        printf("\n\t %d ^ 3 = %d",i,cube);
       }
    printf("\n");
return 0;
}

C Program to print composite numbers between 1 to n.

//Program to print composite numbers between 1 to n.
#include<stdio.h>
int main()
{
    int a,i,j,count=0;
    printf("\n enter up to which number you want to find Composite numbers:");
    scanf("%d",&a);
    for(j=1;j<=a;j++)
    {
        count=0;
        for(i=1;i<=j;i++)
        {
           if(j%i==0)
              count++;
        }
        if(count>2)
        printf(" %d  ",j);
      }
    printf("\n");
return 0;
}

C Program to find sum of n natural numbers

//Program to find sum of n natural numbers
#include<stdio.h>
int main()
{
    int n,sum;
    printf("\n enter a natual number:");
    scanf("%d",&n);
    sum=n*(n+1)/2;
    printf("\n sum of %d natural numbers is : %d \n",n,sum);
return 0;
}

C Program to find FACTORS of a given number

//Program to find FACTORS of a given number
#include<stdio.h>
int main()
{
    int a;
    printf("\n enter a positive number to find factors:");
    scanf("%d",&a);
    printf("\n Factors of %d are : ",a);
    for(int i=1;i<=a;i++)
    {
        if(a%i==0)
          printf(" %d  ",i);
    }
    printf("\n");
return 0;
}
Similar program(s):
C++ Program to print prime factors of given number

C Program to factorial of a number

//Program to factorial of a number
#include<stdio.h>
int main()
{
    int n,i,f;
    printf("\n enter a number to find factorial:");
    scanf("%d",&n);
    f=1;
    for(i=1;i<=n;i++)
        {
          f=f*i;
        }
    printf("\n Factorial of %d is : %d \n",n,f);
return 0;
}

C Program to calculate square of a given number

//Program to calculate square(^2) of a given number
#include<stdio.h>
int main()
{
    int n,square;
    printf("\n Enter a number to find its square:");
    scanf("%d",&n);
    square=n*n;
    printf("\n\t %d ^ 2 = %d \n",n,square);
return 0;
}

C Program to find BIG and SMALL number among two given numbers.

//Program to find BIG&SMALL number among two given numbers.
#include<stdio.h>
int main()
   {
    int a,b,max,min;
    printf("\n Enter 1st number:");
    scanf("%d",&a);
    printf("\n Enter 2nd number:");
    scanf("%d",&b);
    max=(a>b)?a:b;
    min=(a<b)?a:b;
    printf("\n Big number = %d",max);
    printf("\n Small number = %d \n",min);
return 0;
}

C Program to find a given number is prime(or)composite.

//Program to find a given number is prime(or)composite.
#include<stdio.h>
int main()
{
    int a,i,count=0;
    printf("\n enter a positive number:");
    scanf("%d",&a);
    for(i=1;i<=a;i++)
    {
        if(a%i==0)
          count++;
    }
    if(count==1)
          printf("\n 1 is neither Prime nor Composite \n");
    else if(count==2)
          printf("\n It is a prime number \n");
    else if(count>2)
          printf("\n It is a composite number \n");
return 0;
}

C Program to check given string is palindrome (or) not.

//Program to check given string is palindrome (or) not.
#include<stdio.h>
#include<string.h>
int main()
    {
    char s[50];
    printf("\n enter a string : ");
    scanf("%s",s);
    int i=0,j,is_palin=1;
    j=strlen(s)-1;
    while(i<j)
        {
        if(s[i]!=s[j])
                   {
            is_palin=0;
            break;
             }
        else
             {
            ++i;
            --j;
             }
        }
    if(is_palin)
        printf("\n It is palindrome \n");
    else
        printf("\n It is not palindrome \n");
return 0;
}

C Program to generate Fibonacci series

//Program to generate Fibonacci series
#include<stdio.h>
int main()
    {
    int n,i,f1=0,f2=1,f3;
    printf("\n Enter how many numbers you want to generate in Fibonacci series:");
    scanf("%d",&n);
    printf("\n The Fibonacci series is \n");
    printf("\n\t");//Spacing for output
    if(n==1)
        printf("%d",f1);
    else if(n==2)
        printf("%d %d",f1,f2);
    else
        if(n>2)
          {
        printf("%d %d ",f1,f2);
        for(i=3;i<=n;i++)
         {
           f3=f2+f1;
           f1=f2;
           f2=f3;
           printf(" %d ",f3);
         }
          }
    printf("\n");
return 0;
}
         

C Program to calculate cube(^3) of a given number

//Program to calculate cube(^3) of a given number
#include<stdio.h>
int main()
{
    int n,cube;
    printf("\n Enter a number to find its cube:");
    scanf("%d",&n);
    cube=n*n*n;
    printf("\n\t %d ^ 3 = %d",n,cube);
    printf("\n");
return 0;
}

C Program to check a given number is positive,negative (or) zero

//Program to check a given number is positive/negative/zero
#include<stdio.h>
int main()
{
    int n;
    printf("\n Enter a number:");
    scanf("%d",&n);
    if(n<0)
        printf("\n Entered number is negative \n");
    else if(n==0)
        printf("\n Entered number is Zero \n");
    else
        printf("\n Entered number is positive \n");
return 0;
}

C Program to find average of n numbers

//Program to find average of n numbers
#include<stdio.h>
int main()
{
    int n,i,a[100];
    float avg,sum=0;
    printf("\n Of how many number you want to find average:");
    scanf("%d",&n);
        printf("\n Enter numbers:");
        for(i=0;i<n;i++)
         {
           scanf("%d",&a[i]);
         }
        for(i=0;i<n;i++)
         {
           sum=sum+a[i];
         }
    avg=sum/n;
    printf("\n Average of %d numbers is %f \n:",n,avg);
return 0;
}

C Program to sort a list of integers in ascending order

//Program to sort a list of integers in ascending order
#include<stdio.h>
int main()
    {
    int n,i,j,temp,a[100];
    printf("\n How many numbers you want to sort in Ascending order:");
    scanf("%d",&n);
    printf("\n enter elements");
    for(i=0;i<n;i++)
    {
      scanf("%d",&a[i]);
    }
    printf("\n unsorted array \n");
    for(i=0;i<n;i++)
     {
       printf("\t %d",a[i]);
     }
    for(i=0;i<n;i++)
      {
        for(j=0;j<n;j++)
         {
        if(a[j]>a[j+1])
          {
            temp=a[j];
           a[j]=a[j+1];
           a[j+1]=temp;
          }
         }
      }
    printf("\n sorted array in ascending order \n");
    for(i=0;i<n;i++)
     {
       printf("\t%d",a[i]);
     }
     printf("\n");
return 0;
}

C Program to find area of a square

//Program to find area of a square
#include<stdio.h>
int main()
{
    int a,area;
    printf("\n enter the side of a square :");
    scanf("%d",&a);
    printf("\n Area of a square : %d \n",a*a);
    printf("\n Perimeter of square :%d",4*a);
return 0;
}

C Program to find area and perimeter of a rectangle

//Program to find area and perimeter of a rectangle
#include<stdio.h>
int main()
{
    int l,b,area;
    printf("\n enter  length of a rectangle :");
    scanf("%d",&l);
    printf("\n enter breadth/width of a rectangle :");
    scanf("%d",&b);
    printf("\n Area of a rectangle : %d",l*b);
    printf("\n Perimeter of rectangle : %d \n",2*(l+b));
return 0;
}

C Program to calculate area of circle using radius (or) diameter

//Program to calculate area of circle using radius (or) diameter.
#include<stdio.h>
int main()
{
    float n,r,d,area;
    printf("\n You want to calculate area of circle using");
    printf("\n 1.Radius \n 2.Diameter");
    printf("\n Enter your choice:");
    scanf("%g",&n);
    if(n==1)
          {
        printf("\n Enter radius:");
        scanf("%g",&r);       
        printf("\n Area of circle = %g \n",3.14*2*r);
          }
       
    else if(n==2)
          {
        printf("\n Enter diameter:");
        scanf("%g",&d);       
        printf("\n Area of circle = %g \n",3.14*d);
          }
    else
        printf("\n Invalid choice \n");
return 0;
}

C Program to find a given character is vowel or consonant.

//Program to find a given character is vowel or consonant.
#include<stdio.h>
int main()
    {
    char ch;
    printf("\n enter a character :");
    scanf("%c",&ch);
    if(ch=='a'||ch=='e'||ch=='i'||ch=='o'||ch=='u')
        printf("\n %c is a vowel \n",ch);
    else
        printf("\n %c is a consonant \n",ch);
return 0;
    }

C Program to find sum of digits of a given number

//Program to find sum of digits of a given number
#include<stdio.h>
int main()
    {
    int a,r,num,sum=0;
    printf("\n enter a number:");
    scanf("%d",&a);
    if(a<0)
         num=-a;
    else
         num=a;
    while(num>0)
             {
        r=num%10;
        sum=sum+r;
        num=num/10;
         }
    if(a<0)   
          printf("\n sum of digits= -%d \n",sum);
    else
          printf("\n sum of digits=%d \n",sum);
return 0;
   }

C Program to print multiplication table of a given number.

//Program to print multiplication table of a given number.
#include<stdio.h>
int main()
    {
    int n,m,i,k;
    printf("\n enter a number to find its multiplication table :");
    scanf("%d",&m);
    printf("\n Tables of upto %d \n ",m);
    for(i=1;i<=10;i++)
          {
        for(n=1;n<=m;n++)
         {
           printf("\t %d X %d  = %d ",n,i,n*i);
                }
               
         printf("\n");        
         }
         
         
return 0;
    }

C Program to calculate GCD/HCF of two(2) numbers

//Program to calculate GCD/HCF of two(2) numbers
#include<stdio.h>
int main()
     {
    int a,b,max,gcd=1;
    printf("\n enter 1st number:");
    scanf("%d",&a);
    printf("\n enter 2nd number:");
    scanf("%d",&b);
    for(int i=1;i<=a && i<=b;i++)
         {
        if(a%i==0 && b%i==0)
            gcd=i;
         }
    printf("\n GCD of  %d and %d is = %d \n",a,b,gcd);
return 0;
}

C Program to find a given number is even (or) odd.

// Program to find a given number is even (or) odd.
#include<stdio.h>
int main()
    {
    int n,i,is_even=0;
    printf("\n enter a number : ");
    scanf("%d",&n);
    for(i=2;i<n;i++)
         {
        if(n%2==0)
        is_even=1;
         }
    if(is_even)
        printf("\n %d is an even \n",n);
    else
        printf("\n %d is an odd \n",n);
return 0;
}

C Program to find a given number is Composite (or) not.

//Program to find a given number is Composite (or) not.
#include<stdio.h>
int main()
{
    int a,i,count=0;
    printf("\n enter a number:");
    scanf("%d",&a);
    for(i=1;i<=a;i++)
    {
        if(a%i==0)
          count++;
    }
    if(count>2)
    printf("\n It is a composite number \n");
    else
    printf("\n It is a not a composite number \n");
return 0;
}

C Program to print HELLO WORLD

A simple program to start coding C language.Also to understand the syntax of C we first write and execute "Hello World" program.

//Program to print HELLO WORLD
#include<stdio.h>
int main()
    {
    printf("\n HELLO WORLD \n");
 return 0;
    }

C/C++ Program to check given string is palindrome (or) not.

//Program to check given string is palindrome (or) not.
#include<iostream>
#include<string.h>
using namespace std;
int main()
    {
    char s[50];
    cout<<"\n enter a string : ";
    cin>>s;
    int i=0,j,is_palin=1;
    j=strlen(s)-1;
    while(i<j)
        {
        if(s[i]!=s[j])
                   {
            is_palin=0;
            break;
             }
        else
             {
            ++i;
            --j;
             }
        }
    if(is_palin)
        cout<<"\n It is palindrome"<<endl;
    else
        cout<<"\n It is not palindrome"<<endl;
return 0;
}
Similar program(s)
C++ Program to check given string is palindrome without library function

C/C++ Program to find frequency count of a character in a given text

//Program to find frequency count of a character in a given text
#include<iostream>
using namespace std;
int main()
   {
    char a[100],ch;
    int i,f=0;
    cout<<"\n Enter a string : ";
    cin>>a;
    cout<<"\n enter a character to find its frequency : ";
    cin>>ch;
    for(i=0;a[i]!='\0';i++)
       {
        if(ch==a[i])
            f++;
       }
    cout<<"\n Frequency count of "<<ch<<" is : "<<f;
    cout<<endl;
return 0;
}
           

C/C++ Program to genereate Fibonnaci series

//Program to generate Fibonacci series
#include<iostream>
using namespace std;
int main()
    {
    int n,i,f1=0,f2=1,f3;
    cout<<"\n Enter how many numbers you want to generate in Fibonacci series:";
    cin>>n;
    cout<<"\n The Fibonacci series is"<<endl;
    cout<<"\n\t";//Spacing for output
    if(n==1)
        cout<<f1;
    else if(n==2)
        cout<<f1<<" "<<f2;
    else
        if(n>2)
          {
        cout<<f1<<" "<<f2;
        for(i=3;i<=n;i++)
         {
           f3=f2+f1;
           f1=f2;
           f2=f3;
           cout<<" "<<f3;
         }
          }
    cout<<endl;
return 0;
}
         

C/C++ Program to sort a list of integers in descending order

//Program to sort a list of integers in descending order
#include<iostream>
using namespace std;
int main()
    {
    int n,i,j,temp,a[100];
    cout<<"\n How many numbers you want to sort in Descending order:";
    cin>>n;
    cout<<"\n enter elements"<<endl;
    for(i=0;i<n;i++)
    {
      cin>>a[i];
    }
    cout<<"\n unsorted array"<<endl;
    for(i=0;i<n;i++)
     {
       cout<<"\t"<<a[i];
     }
    for(i=0;i<n;i++)
      {
        for(j=0;j<n;j++)
         {
        if(a[j]<a[j+1])
          {
            temp=a[j];
           a[j]=a[j+1];
           a[j+1]=temp;
          }
         }
      }
    cout<<"\n sorted array in descending order";
    cout<<endl;
    for(i=0;i<n;i++)
     {
       cout<<"\t"<<a[i];
     }
     cout<<endl;
return 0;
}

C/C++ Program to sort a list of integers in ascending order

//Program to sort a list of integers in ascending order
#include<iostream>
using namespace std;
int main()
    {
    int n,i,j,temp,a[100];
    cout<<"\n How many numbers you want to sort in Ascending order:";
    cin>>n;
    cout<<"\n enter elements"<<endl;
    for(i=0;i<n;i++)
    {
      cin>>a[i];
    }
    cout<<"\n unsorted array"<<endl;
    for(i=0;i<n;i++)
     {
       cout<<"\t"<<a[i];
     }
    for(i=0;i<n;i++)
      {
        for(j=0;j<n;j++)
         {
        if(a[j]>a[j+1])
          {
            temp=a[j];
           a[j]=a[j+1];
           a[j+1]=temp;
          }
         }
      }
    cout<<"\n sorted array in ascending order";
    cout<<endl;
    for(i=0;i<n;i++)
     {
       cout<<"\t"<<a[i];
     }
     cout<<endl;
return 0;
}

Java Program to find max and min in a list of integers

//Program to find max and min in a list of integers
import java.util.*;
import java.io.*;
class maxmin
{
         public static void main(String args[])
            {
int []a=new int[25];
int i,n;
Scanner obj=new Scanner(System.in);
System.out.println("how many  integers");
n=obj.nextInt();
System.out.println("enter a list of integers");
for( i=0;i<n;i++)
         {
a[i]=obj.nextInt();
         }
int max,min;
max=min=a[0];
for( i=0;i<n;i++)
             {
if(max<a[i])
{ max=a[i]; }

else if(min>a[i])
{ min=a[i]; }
             }
System.out.println("maximum = "+max);

System.out.println("minimum = "+min);
          }
}

C/C++ Program to calculate area of circle

//Program to calculate area of circle
#include<iostream>
using namespace std;
int main()
{
    double n,r,d,area;
    cout<<"\n You want to calculate area of circle using";
    cout<<"\n 1.Radius \n 2.Diameter"<<endl;
    cout<<"\n Enter your choice:";
    cin>>n;
    if(n==1)
          {
        cout<<"\n Enter radius:";
        cin>>r;       
        cout<<"\n Area of circle ="<<3.14*2*r<<endl;
          }
       
    else if(n==2)
          {
        cout<<"\n Enter diameter:";
        cin>>d;       
        cout<<"\n Area of circle ="<<3.14*d<<endl;
          }
    else
        cout<<"\n Invalid choice"<<endl;
return 0;
}

C/C++ Program to print cube(s) from 1 to n

//Program to print cube(s) from 1 to n
#include<iostream>
using namespace std;
int main()
{
    int n,i,cube;
    cout<<"\n Enter upto which number you want to find cube(s):";
    cin>>n;
    for(i=1;i<=n;i++)
       {
        cube=i*i*i;
        cout<<"\n\t"<<i<<"^3"<<" = "<<cube;
       }
    cout<<endl;
return 0;
}

C/C++ Program to print square(s) from 1 to n

//Program to print square(s) from 1 to n
#include<iostream>
using namespace std;
int main()
{
    int n,i,square;
    cout<<"\n Enter a upto which number you want to find square(s):";
    cin>>n;
    cout<<"\n Square value(s):"<<endl;
    for(i=1;i<=n;i++)
        {
        square=i*i;
        cout<<"\n\t"<<i<<"^2 = "<<square;
        }
    cout<<endl;
return 0;
}

C/C++ Program to calculate cube of a given number

//Program to calculate cube of a given number
#include<iostream>
using namespace std;
int main()
{
    double n,cube;
    cout<<"\n Enter a number to find its cube:";
    cin>>n;
    cube=n*n*n;
    cout<<"\n\t"<<n<<"^3"<<" = "<<cube;
    cout<<endl;
return 0;
}

C/C++ Program to calculate square of a given number

//Program to calculate square of a given number
#include<iostream>
using namespace std;
int main()
{
    double n,square;
    cout<<"\n Enter a number to find its square:";
    cin>>n;
    square=n*n;
    cout<<"\n\t"<<n<<"^2"<<" = "<<square;
    cout<<endl;
return 0;
}

C/C++ Program to convert mile into km and vice-versa

//Program to convert mile into km and vice-versa
#include<iostream>
using namespace std;
int main()
{
    double km,mile;
    int ch;
    cout<<"\n Enter your choice:";
    cout<<"\n\t 1. Convert KM into MILE \n\t 2.Convert MILE to KM"<<endl;
    cout<<"\n Enter  your choice :";
    cin>>ch;
    switch(ch)
         {
        case 1: cout<<"\n enter value to convert into MILE :";
            cin>>km;
            cout<<"\n "<<km<<" km = "<< km*0.621371<<" Mile approx."<<endl;
            break;
        case 2: cout<<"\n enter value to convert into KM :";
            cin>>mile;
            cout<<"\n "<<mile<<" Mile= "<<mile*1.60934<<" Km approx."<<endl;
            break;
        default: cout<<"\n Invalid option"<<endl;
            break;
         }
return 0;
}

C/C++ Program to swap to integers without temp variable

//Program to swap to integers without temp variable
#include<iostream>
using namespace std;
int main()
{
    int a,b;
    cout<<"\n enter A:";
    cin>>a;
    cout<<"\n enter B:";
    cin>>b;
    cout<<"\n Before swapping";
    cout<<"\n A:"<<a<<"\t B:"<<b;
    a=a+b;
    b=a-b;
    a=a-b;
    cout<<"\n After swapping";
    cout<<"\n A:"<<a<<"\t B:"<<b<<endl;
return 0;
}

C/C++ Swap two integers using temp variable

//Program to swap two integers using temp variable
#include<iostream>
using namespace std;
int main()
{
    int a,b,temp;
    cout<<"\n enter A:";
    cin>>a;
    cout<<"\n enter B:";
    cin>>b;
    cout<<"\n Before swapping";
    cout<<"\n A:"<<a<<"\t B:"<<b;
    temp=a;
    a=b;
    b=temp;
    cout<<"\n After swapping";
    cout<<"\n A:"<<a<<"\t B:"<<b<<endl;
return 0;
}

C/C++ Program to find sum of cubes of n natural numbers

//Program to find sum of cubes of n natural numbers
#include<iostream>
using namespace std;
int main()
{
    int n,sum;
    cout<<"\n enter upto which number you want to find sum of cubes:";
    cin>>n;
    sum=n*(n+1)/2;//using sum of n naturals formula
    sum=sum*sum;
    cout<<"\n sum of "<<n<<" natural numbers is : "<<sum<<endl;
return 0;
}
Similar program(s) :
C++ Program to find sum of squares of n natural numbers

C++ Program to find sum of n natural numbers

C/C++ Program to find sum of squares of n natural numbers

//Program to find sum of squares of n natural numbers
#include<iostream>
using namespace std;
int main()
{
    int n,sum;
    cout<<"\n enter upto which number you want to find sum of squares:";
    cin>>n;
    sum=(n*(n+1)*(2*n+1))/6;
    cout<<"\n sum of squares of  "<<n<<" natural numbers is : "<<sum<<endl;
return 0;
}
Similar program(s):
C++ Program to find sum of cubes of n natural numbers 
C++ Program to find sum of digits of a given number 
C++ Program to print square(s) from 1 to n
C++ Program to print cube(s) from 1 to n 

C/C++ Program to print composite numbers between 1 to n.

//Program to print composite numbers between 1 to n.
#include<iostream>
using namespace std;
int main()
{
    int a,i,j,count=0;
    cout<<"\n enter upto which number you want to find Composite numbers:";
    cin>>a;
    for(j=1;j<=a;j++)
    {
        count=0;
        for(i=1;i<=j;i++)
        {
           if(j%i==0)
              count++;
        }
        if(count>2)
        cout<<" "<<j;
      }
    cout<<endl;
return 0;
}
Similar program(s) :
C++ Program to find a given number is Composite (or) not. 
C++ Program to find a given number is even (or) odd.
C++ Program to find a given number is Prime (or) not.

C/C++ Program to find a given number is prime(or)composite.

//Program to find a given number is prime(or)composite.
#include<iostream>
using namespace std;
int main()
{
    int a,i,count=0;
    cout<<"\n enter a positive number:";
    cin>>a;
    for(i=1;i<=a;i++)
    {
        if(a%i==0)
          count++;
    }
    if(count==1)
          cout<<"\n 1 is neither Prime nor Composite"<<endl;
    else if(count==2)
        cout<<"\n It is a prime number"<<endl;
    else if(count>2)
        cout<<"\n It is a composite number"<<endl;
return 0;
}
Similar program(s):
C++ Program to find a given number is even (or) odd.
C++ Program to find a given number is Prime (or) not.
C++ Program to find a given number is Composite (or) not. 
C++ Program to print composite numbers between 1 to n. 
C++ Program to find prime number between 1 and n

C/C++ Program to find a given number is Composite (or) not.

//Program to find a given number is Composite (or) not.
#include<iostream>
using namespace std;
int main()
{
    int a,i,count=0;
    cout<<"\n enter a number:";
    cin>>a;
    for(i=1;i<=a;i++)
    {
        if(a%i==0)
          count++;
    }
    if(count>2)
    cout<<"\n It is a composite number"<<endl;
    else
    cout<<"\n It is a not a composite number"<<endl;
return 0;
}
Similar program(s) :
C++ Program to find a given number is even (or) odd.
C++ Program to find a given number is Prime (or) notC++ Program to find prime number between 1 and n

C/C++ Program to find maximum n minimum in a list of numbers

//Program to find maximum n minimum in a list of numbers
#include<iostream>
using namespace std;
int main()
{

    int a[30],i,n,max,min;
    cout<<"\n how many numbers you want to enter in the list:";
    cin>>n;
    cout<<"\n enter a list of integers:"<<endl;
    for( i=0;i<n;i++)
    {
        cin>>a[i];
    }
    max=min=a[0];
    for( i=0;i<n;i++)
    {
        if(max<a[i])
             max=a[i];
   
        else if(min>a[i])
              min=a[i];
    }
    cout<<"\n maximum="<<max;
    cout<<"\n minimun="<<min<<endl;
return 0;
    }

C/C++ Program to find a given character is vowel (or) consonant.

//Program to find a given character is vowel (or) consonant.
#include<iostream>
using namespace std;
int main()
{
    char ch;
    cout<<"\n enter a character :";
    cin>>ch;
    if(ch=='a'||ch=='e'||ch=='i'||ch=='o'||ch=='u')
        cout<<"\n "<<ch<<" is a vowel "<<endl;
    else
        cout<<"\n "<<ch<<" is a consonant"<<endl;
return 0;
}

C/C++ Program to print multiplication table of a given number.

//Program to print multiplication table of a given number.
#include<iostream>
using namespace std;
int main()
{
    int n,i;
    cout<<"\n enter a number to find its multiplication table :";
    cin>>n;
    cout<<"\n Table of "<<n<<endl;
    for(i=1;i<=10;i++)
        cout<<"\t"<<n<<" X "<<i<<" = "<<n*i<<endl;
        cout<<endl;

return 0;
}

C/C++ Program to find area and perimeter of a rectangle

//Program to find area and perimeter of a rectangle
#include<iostream>
using namespace std;
int main()
{
    int l,b,area;
    cout<<"\n enter  length of a rectangle :";
    cin>>l;
    cout<<"\n enter breadth/width of a rectangle :";
    cin>>b;
    cout<<"\n Area of a rectangle :"<<l*b<<endl;
    cout<<"\nPerimeter of rectangle :"<<2*(l+b)<<endl;
return 0;
}

C/C++ Program to find area of a square

//Program to find area of a square
#include<iostream>
using namespace std;
int main()
{
    int a,area;
    cout<<"\n enter the side of a square :";
    cin>>a;
    cout<<"\n Area of a square :"<<a*a<<endl;
    cout<<"\n Perimeter of square :"<<4*a<<endl;
return 0;
}

C/C++ Program to factorial of a number

//Program to factorial of a number
#include<iostream>
using namespace std;
int main()
{
    int n,i,f;
    cout<<"\n enter a number to find factorial:";
    cin>>n;
    f=1;
    for(i=1;i<=n;i++)
        {
          f=f*i;
        }
    cout<<"\n Factorial of "<<n<<" is :"<<f<<endl;
return 0;
}