convert a int to a unicode javascript

let unicodeInteger = 97;

String.fromCharCode(unicodeInteger); //  'a'

// the String method fromCharCode converts any integer that is used
// for unicode character indexing into its relative chracter

// 97 - 122 is a - z 
// 65 - 90 is A - Z

// try it out in the w3schools editor 
// https://www.w3schools.com/jsref/tryit.asp?filename=tryjsref_fromcharcode