Showing posts with label Program to identify the prime number. Show all posts
Showing posts with label Program to identify the prime number. Show all posts

Wednesday, 17 August 2011

Program to identify the prime number


Code:
#include<stdio.h>
#include<conio.h>
void main()
{
      int num,flag=0,a;
            printf("Enter an integer: ");
            scanf("%d",&num);
      //Logic for prime number
            if(num==2)
                  printf("%d is Prime Number.",num); 
            else
            {
                  for(a=2;a<num;a++)
                  {
                        if(num%a==0)
                              flag=1;
                  }
            }
            if(flag==1)
                  printf("%d is not a Prime Number.",num);
            else
                  printf("%d is Prime Number.",num);
      getch();

}

Result:

Enter an integer: 8
8 is not a Prime Number.

If you have any confusion about that program, contact me freely :)