C Program To Check Whether The Entered Number Is PRIME or NOT.

/* Program to check whether the entered number is PRIME or NOT. */

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#include<stdio.h>
#include<conio.h>
void main()
{
int a,i,count=0;
clrscr();
printf("Enter A No. : ");
scanf("%d",&a);
for(i=2;i<=a/2;i++)
    {
    if(a%i==0)
       {
        count++;
        break;
        }
    }
if(count==0&&a!=1)
  printf("\n%d Is PRIME.",a);
else
  printf("\n%d Is NOT PRIME.",a);
getch();
}

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