factorial

factorial.rb

# This are examples of how to implement a factorial in Ruby

def ft(n)
  return 1 if n <= 1
  
  n.downto(1).inject(:*)
end


def factorial(n)
  return 1 if n <= 1
  n * factorial(n - 1)
end

#include <stdio.h>

int main() {
  int c, n;
  long double fact = 1;

  printf("=>");
  scanf("%d", &n);

  for (c=1; c <= n; c++) {
    fact = fact * c;
  }

  printf("%Le\n", fact); /* this is still not the correct output */
  return 0;
}

./factorial
=>10001
inf

Read the one made with erlang here: https://gist.github.com/Davidslv/8832054