isPrime.c

#include <stdio.h>

int main() {

    int n = 100;
    int i;
    int j;
    for(i = 3;i<=100;i++){
        int isPrime = 1;
        for(j = 2;j<i;j++){
            if( i % j == 0 ){
                isPrime = 0;
            }
        }
        if(isPrime){
            printf("%d is prime\n",i);
        }
    }

    return 0;
}