# How to Change Negative Number to Positive in Javascript

In this tutorial, you will learn how to convert negative number to positive number in javascript. You cannot conduct any calculation without numbers. A number is simply an arrangement of digits from 0 to 9. For a newbie developer, it can be a bit tricky to change negative number to positive number.

There are numerous ways to change negative number to positive number. But for the sake of simplicity, we will make use of  `Math` object.  This object contains a lot of methods and properties which can help us in various mathematical operations. One of those methods is the `abs()` method.

The `abs()` method returns an absolute value of a number. The absolute value of a number is given by its distance from zero on the number line, without regard to direction. An absolute value is, to put it simply, the value left over after subtracting any preceding negative sign from a number. The absolute value of -1 is 1.

In the following example, we have an input field in which we will enter a random negative number. Upon click of a button, we will change negative number into a positive number and display that on the screen.  Please have a look over the code example and the steps given below.

HTML & CSS

• We have 4 elements in the HTML file (`div``input``button`, and `h1`). The `div` element is just a wrapper for the rest of the elements.
• The `innerText` for the `button` element is `“Get”` and for the `h1` element, it is `“Result”`.
• We have done some basic styling using CSS and added the link to our `style.css` stylesheet inside the `head` element.
• We have also included our javascript file `script.js` with a `script` tag at the bottom.
```<!DOCTYPE html>
<html lang="en">

<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>

<body>

<div class="container">
<input type="number" placeholder="Enter Number">
<button>Get</button>
<h1>Result</h1>
</div>

<script src="script.js"></script>
</body>

</html>```
```.container {
text-align: center;
}

button {
margin-top: 10px;
}

input {
display: block;
margin: 10px auto;
}

input[type=number]::-webkit-inner-spin-button,
input[type=number]::-webkit-outer-spin-button {
-webkit-appearance: none;
margin: 0;
}```

Javascript

• We have selected the `input` element, `button` element, and `h1` element using the `document.querySelector()` method and stored them in `input``btnGet`, and `output` variables respectively.
• We have attached a `click` event listener to the `button` element.
• In the event handler function, we are storing the value of the `input` element in the `num` variable.
• We are calling the `abs()` method to get the absolute of `num` and storing it in the `result` variable.
• We are displaying the `result` in the `h1` element using the `innerText` property.
```let input = document.querySelector("input");
let btnGet = document.querySelector("button");
let output = document.querySelector("h1");

let num = input.value;
let result = Math.abs(num);
output.innerText = result;
});```