JSFiddle - React, Tailwind, and code Playground

by JeyDotC

JavaScript

function f(i) {
    var r = i % 10;
    var q = parseInt(i / 10);

    if (q > 0) {
        return f(q) + '0' + r;
    } else {
        return '0' + r;
    }
}

alert(f(2500));