Computes the factorial of number 'n' in c-lang

factorial.c

#include <stdio.h>

int factorial(int n){
    int a = 1;

    for (int i = 1; i <= n; ++i) {
        a *= i;
    }

    return a;
}

int main() {
    printf("Please enter the positive integer:");

    int n;
    while (scanf("%d", &n) != EOF) {
        if (n > 0) {
            printf("Factorial is: %d", factorial(n));
            printf("\n");
        } else {
            printf("Please, enter positive number");
        }
    }
    return 0;
}