JSFiddle - React, Tailwind, and code Playground

JavaScript

var num1 = Number(window.prompt("Entre com primeiro numero"));
var num2 = Number(window.prompt("Entre com segundo numero"));

var start, end;
if (num1 > num2)(start = num2, end = num1);
else if (num1 < num2)(start = num1, end = num2);
else start = end = num1;

var i = start;
while ((i++) < end - 1) {
    document.body.innerHTML += i + '<br>';
}