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Create an Array of Alphabet characters in JavaScript


Different ways to get letters alphabet array in Javascript


Manual Function – Define Alphabet Array

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']


Using Map Function – Alphabet Array


script:
function generateAlphabetChars(capital = false) {
	return [...Array(26)].map((_, i) => String.fromCharCode(i + (capital ? 65 : 97)));
}

Array of lowercase letters (Javascript function)

generateAlphabetChars();


output:

(26) ['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']

Array of uppercase letters (Javascript function)

generateAlphabetChars(true);


output:

(26) ['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']


Using Keys – Characters Array

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