#include <stdio.h>

int isPrime(int n);		// Declare function

int main(int argc, char* argv[])
{
    int x;
       
    printf("Enter a number: ");
    scanf("%d", &x);

    if ( isPrime(x) )
	printf("%d is prime\n", x);
    else
	printf("%d is not prime\n", x);
}


int isPrime(int n)
{
    int nIsPrime;   // int variable used as a boolean

    nIsPrime = 1;   // 1 = True

    for ( int i = 2; i < n; i++ )
    {
        if ( n%i == 0 )
        {
            nIsPrime = 0;  // n is not prime
            break;
        }
    }

   return nIsPrime;
}