gistfile1.js

function isEven(number){
  // if number modulo 2 is 0, it means that the number divided by two has no remainder, which means it's even.
  // 4 % 2 = 0
  // 3 % 2 = 1
  if(number % 2 === 0){
    return true;
  }
  else
  {
    return false;
  }
}