Collatz Conjecture in JS

collatz.js

#!/usr/bin/env node

'use strict'

function collatz(num) {
  var result;

  if (num % 2 === 0) {
    result = num / 2;
  } else {
    result = 3 * num + 1;
  }

  console.log(result);
  
  if (result === 1) {
    return;
  }

  collatz(result);
}

collatz(parseInt(process.argv[2], 10));