C program to check number is prime or not.

WAP to check whether number is prime or not.

Program:

#include<stdio.h>                   

#include<conio.h>

int main()
{

       int n,i,a=0;  //Declaring Variable.
      
       printf(" enter the number : "); //For printing

       scanf("%d",&n);   //For Input.

        for(i=2; i<n/2; i++)  //For Loop.

        {

                if(n%i==0)

                {

                    a=1;
                    break;
                }

        }

    if(a==0)

       printf("%d is a prime number.",n); //For printing

    else

       printf("%d is not a prime number.",n);  //For printing

   getch();  //Getting a chracter or waiting for key press.

  return 0;

}

Output:

Video Explanation

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