JSFiddle - React, Tailwind, and code Playground

JavaScript

function charLoop(from, to, callback)
{
    var i = from.charCodeAt(0);
    var to = to.charCodeAt(0);
    for(;i<=to;i++) callback(String.fromCharCode(i));
}

var sequence = "";
charLoop("A", "K", function(char) {
    sequence += char + " ";
});
document.body.innerHTML = sequence;