challenge01.md

function drawLine(length = 0) {
  // We don't need to do anything in the loop itself. This is honestly a little
  // too "clever" but it works to build a string of #s.
  for(var line = ''; line.length < length; line += '#') {
  }

  // Bonus part:
  // This checks if the number of #s will be even or not.
  // It's called the "modulo operator". Think of it as "the remainder of
  // dividing one number by the other".
  // Thus:
  //
  //     0 % 2 is 0
  //     1 % 2 is 1
  //     2 % 2 is 0
  //     3 % 2 is 1
  //     4 % 2 is 0
  var isEven = length % 2 === 0

  return [line, isEven]
}

function main() {
  // Draw 8 lines.
  for (var i = 0; i < 8; i++) {
    console.log(drawLine(i))
  }
}

main()