javascript convert letter to number code example

Example 1: javascript letters as number

const toChars = n => `${n >= 26 ? toChars(Math.floor(n / 26) - 1) : ''}${'ABCDEFGHIJKLMNOPQRSTUVWXYZ'[n % 26]}`;

// Examples
toChars(0);     // A
toChars(1);     // B
toChars(25);    // Z

Example 2: convert string to number javascript

var myString = "869.99"
var myFloat = parseFloat(myString)
var myInt = parseInt(myString)