Day8.js

// Challenge: Factorial Finder

// Write a function factorial that takes a non-negative integer num as input and returns its factorial.
// The factorial of a non-negative integer n, denoted as n!, is the product of all positive integers less than or equal to n.
// The factorial of 0 is defined as 1.

// Here are some examples of factorial calculations:

// factorial(0) => 1
// factorial(1) => 1
// factorial(2) => 2
// factorial(3) => 6
// factorial(4) => 24
// factorial(5) => 120

const factorial = (num) => {
  let fact = 1;
  for (let i = 1; i <= num; i++) {
    fact = fact * i;
  }
  return fact;
};

console.log(factorial(5));



function factorial2(num) {
  // Base case: if num is 0, return 1
  if (num === 0) {
    return 1;
  }
  // Recursive case: multiply num by the factorial of num - 1
  else {
    return num * factorial2(num - 1);
  }
}
console.log("factorial with recursion", factorial(5));