recursion_workshop_23/factorial/factorial.c

#include <stdio.h>

int factorial(int n) {
  if (n == 0) {
    return 1;
  }

  return n * factorial(n - 1);
}

int main() {
  int n;
  scanf("%d", &n);

  printf("%d\n", factorial(n));
  return 0;
}