Passing empty parameter to a method in JavaScript

Following is the code passing empty parameter to a method in JavaScript −


 Live Demo

<!DOCTYPE html>
<html lang="en">
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
   body {
      font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
   .result {
      font-size: 18px;
      font-weight: 500;
      color: blueviolet;
<h1>Passing empty parameter to a method</h1>
<div class="result"></div>
<button class="Btn">Click here</button>
<h3>Click on the above button to call multiply function and pass empty
parameters to it</h3>
   let resEle = document.querySelector(".result");
   let BtnEle = document.querySelector(".Btn");
   function multiply(a = 2, b = 4) {
      return a * b;
   BtnEle.addEventListener("click", () => {
      resEle.innerHTML = "The multiplication of numbers = " + multiply();


On clicking the ‘Click here’ button −