C Program - Calculate the Factorial of a Number Using Recursion

#include <stdio.h>

long factorial(int n) {
    if(n == 0)
        return 1;
    else
        return n * factorial(n - 1);
}

int main() {
    int num;
    printf("Enter a positive integer: ");
    scanf("%d", &num);
    printf("Factorial of %d = %ld\n", num, factorial(num));
    return 0;
}

Enter a positive integer: 5
Factorial of 5 = 120

Factorial Using Recursion