Program to find if the given no. is prime or not. The function should accept the number as argument and return if the no. is prime or not.
CODING:
#include <stdio.h>
int checkPrimeNumber(int n);

int main()
{
    int n, flag;

    printf("Enter a positive integer: ");
    scanf("%d",&n);


    flag = checkPrimeNumber(n);

    if(flag==1)
        printf("%d is not a prime number",n);
    else
        printf("%d is a prime number",n);

    return 0;
}


{

int i;

    for(i=2; i <= n/2; ++i)
    {
        if(n%i == 0)
            return 1;
    }

    return 0;
}