C programming, Compute the factorial of a number using a recursive function.

#include<stdio.h>

long int multiplyNumbers(int n);

int main() {

    int n;

    printf("Enter a positive integer: ");

    scanf("%d",&n);

    printf("Factorial of %d = %ld", n, multiplyNumbers(n));

    return 0;

}

long int multiplyNumbers(int n) {

    if (n>=1)

        return n*multiplyNumbers(n-1);

    else

        return 1;

}