JSFiddle - React, Tailwind, and code Playground

by puuga

HTML

<input id="num1" type="number"></input>
<input id="num2" type="number"></input>
<button onclick="multi()">click</button>
<div id="output"></div>

JavaScript

// multiply
function multi() {
    var num1 = 1*document.getElementById("num1").value;
    var num2 = 1*document.getElementById("num2").value;
    document.getElementById("output").innerHTML = multiply(num1,num2);   
}

function multiply(num1, num2) {
    if(num2==0)
        return 0;
    return num1 + multiply(num1,num2-1);
}