JSFiddle - React, Tailwind, and code Playground

by Tushar Jadhav

HTML

<button onclick="myFunction()">Calculate</button>
<br/>
<input type="text" placeholder="1st number" id="1st" name="txt1">
<br/>+
<br/>
<input type="text" placeholder="2nd number" id="2nd" name="txt2">
<p id="demo"></p>

JavaScript

function myFunction() {
    var a = document.getElementById("1st").value;
    var b = document.getElementById("2nd").value;
    var c = Number(a) + Number(b);

    document.getElementById("demo").innerHTML = c;
}