JavaScript Sum function on the click of a button

Javascript Web Development Object Oriented Programming

Let’s say the following is our button −

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

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 −

Example

Live Demo

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initialscale=
1.0">
<title>Document</title>
<link rel="stylesheet" href="//code.jquery.com/ui/1.12.1/themes/base/jquery-ui.css">
<script src="https://code.jquery.com/jquery-1.12.4.js"></script>
<script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/fontawesome/ 4.7.0/css/font-awesome.min.css">
</head>
<body>
<p>
<h1> Adding 10 each time whenever you click the Sum
Button......</h1>
</p>
<b id="firstValue">10</b>
<button type="button" onclick="addTheValue(10)">Sum </button>
<script>
   function addTheValue(secondValue) {
      var fValue = document.getElementById("firstValue");
      firstValue.innerHTML = parseInt(fValue.innerHTML) +
      parseInt(secondValue);
   }
</script>
</body>
</html>

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 −