Increment a string with letters?

Question

I need to increment a string from.. let\'s say aaa to zzz and write every incrementation in the console (is incrementation even a word?). It would go s

Answer 1

Gets A-Z, AA-ZZ, AAA-ZZZ etc. until the number of cycles is up.

function createList(maxCycles) {
  if (typeof maxCycles != "number") {
    console.log("number expected");
    return;
  }

  const alphaLen = 26;
  const alpha = ["A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z"];

  let list = [alpha];

  // go through all cycles
  for (let cycleNo = 1; cycleNo < maxCycles; cycleNo++) {
    list[cycleNo] = [];
    pastCollection = list[cycleNo - 1];
    pastLen = pastCollection.length;

    for (let i = 0; i < pastLen; i++) {
      for (let j = 0; j < alphaLen; j++) {
        // use past item then add a letter of the alphabet at the end
        list[cycleNo].push(pastCollection[i] + alpha[j]);
      }
    }
  }

  return list;
}

(function(maxCycles) {
  console.log(createList(maxCycles));
})(3);