JAVASCRIPT

how to make an alphabet in javascript

// To get an array of letters from 'a' to 'z' in javascript.

let alphabet = 'abcdefghijklmnopqrstuvwxyz'.split('');

js letters alphabet array

const letters = ['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', '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']
const upperLetters = [ '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' ]
const lowerLetters = ['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']

alphabet letters in js code

// To get alphabet all lowercase letters from "a" to "z" in javascript array.   
const alphabetLowerCase = ["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"];
// To get alphabet all uppercase letters from "A" to "Z" in javascript array.   
const alphabetAllCaps = ["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"];

js alphabets array

let alphabet = [...Array(26).keys()].map(i => String.fromCharCode(i + 97));

alphabet javascript

const alphabet = "abcdefghijklmnopqrstuvwxyz".split("");
const alphabetUp = toUpperCase("abcdefghijklmnopqrstuvwxyz").split("");

javascript number in alphabet

/**
 * Convert a whole number that is more than zero to a spreadsheet column letters. eg. 1 -> A
 * Source: https://stackoverflow.com/questions/45787459/convert-number-to-alphabet-string-javascript/45787487
 * 
 * @param {Number} num - (required) The number to convert to a spreadsheet column letter. Must be greater than zero.
 *
 * @returns {(String|undefined)} The spreadsheet column letter or undefined.
 */
function numToSSColumnLetter(num) {
  let columnLetter = "",
    t;

  while (num > 0) {
    t = (num - 1) % 26;
    columnLetter = String.fromCharCode(65 + t) + columnLetter;
    num = (num - t) / 26 | 0;
  }
  return columnLetter || undefined;
}

numToSSColumn(0); // undefined
numToSSColumn(1); // A
numToSSColumn(26); // Z
numToSSColumn(-1); // undefined
numToSSColumn(27); // AA
numToSSColumn(475254); // ZZZZ

make alphabet js

[...Array(10).keys()]//=> [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]