tower.js

// Prints a tower based on the height passed into the main function
// e.g height of 8 prints this:
//        #  #
//       ##  ##
//      ###  ###
//     ####  ####
//    #####  #####
//   ######  ######
//  #######  #######
// ########  ########

function duplicateChar(character, times) {
  return character.repeat(times);
}

function main(height) {
  if (height < 4) {
    console.log("That height is too low to enjoy a good view from your tower");
    return;
  }

  for (let i = 1; i <= height; i++) {
    let str =
      duplicateChar(" ", height - i) +
      duplicateChar("#", i) +
      duplicateChar(" ", 2) +
      duplicateChar("#", i);
    console.log(str);
  }
}

main(14);