JSFiddle - React, Tailwind, and code Playground

by Saumil Soni

HTML

<h1></h1>

<form name="Calcultor" Method="Get" id='form1'>First Number:
    <input type="text" name="fnum" size="35" id="first">+ Second Number:
    <input type="text" name="snum" size="35" id="sec">
    <br>
    <br>Answer:
    <input type="text" name="ans" size="35" id="ans" />
    <button type="button" onclick="Calculate();">Calculate</button>
</form>
<script lang="javascript">
    function Calculate() {
        var first = document.getElementById('first').value;
        var last = document.getElementById('sec').value;

        document.getElementById('ans').value = parseInt(first) + parseInt(last);
        document.form1.submit();
    }
</script>