Loop from A to Z in jQuery

Answer 1

You can avoid having numbers like 65 in your code if you just use charCodeAt() and fromCharCode().

Print letters from a to z:

for(let i = 'a'.charCodeAt(0); i <= 'z'.charCodeAt(0); i++) {
  $('#select_id_or_class').append(
    '' + String.fromCharCode(i) + ''
  );
}

Or:

const aCharCode = 'a'.charCodeAt(0);

for(let i = aCharCode; i <= (aCharCode + 26); i++) {
  $('#select_id_or_class').append(
    '' + String.fromCharCode(i) + ''
  );
}

If you want the uppercase characters, replace 'a'.charCodeAt(0) with 'A'.charCodeAt(0)