null created by ChrisLis - https://repl.it/HaJO/61

HaJO-61.js

// Write a function that takes an integer `n` in; it should return
// n*(n-1)*(n-2)*...*2*1. Assume n >= 0.
//
// As a special case, `factorial(0) == 1`.
//
// Difficulty: easy.

function factorial(n) {
  var fact=1
  if(n==0)
  {
    return fact
  }
  else
  {
    for(var i=1;i<=n;i++)
    {
      fact *=i
    }
    return fact
  }
}

// These are tests to check that your code is working. After writing
// your solution, they should all print true.

console.log("\nTests for //factorial")
console.log("===============================================")
    console.log(
      'factorial(0) == 1: ' + (factorial(0) == 1)
    )
    console.log(
      'factorial(1) == 1: ' + (factorial(1) == 1)
    )
    console.log(
      'factorial(2) == 2: ' + (factorial(2) == 2)
    )
    console.log(
      'factorial(3) == 6: ' + (factorial(3) == 6)
    )
    console.log(
      'factorial(4) == 24: ' + (factorial(4) == 24)
    )
console.log("===============================================")