JavaScript Sum function on the click of a button

Let’s say the following is our button −

<button type="button" onclick="addTheValue(10)">Sum </button>

We are calling the function addTheValue(10) with parameter 10 on button click. On clicking the button, we are adding the value 10 as in the below code −


 Live Demo

<!DOCTYPE html>
<html lang="en">
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initialscale=
<link rel="stylesheet" href="//">
<script src=""></script>
<script src=""></script>
<link rel="stylesheet" href=" 4.7.0/css/font-awesome.min.css">
<h1> Adding 10 each time whenever you click the Sum
<b id="firstValue">10</b>
<button type="button" onclick="addTheValue(10)">Sum </button>
   function addTheValue(secondValue) {
      var fValue = document.getElementById("firstValue");
      firstValue.innerHTML = parseInt(fValue.innerHTML) +

To run the above program, save the file name “anyName.html(index.html)” and right click on the file. Select the option “Open with Live Server” in VS Code editor.

This will produce the following output −

Now, I am going click the “Sum” button for the first time.

This will produce the following output −

Updated on: 01-Sep-2020

3K+ Views

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