JavaScript Math abs() method

The JavaScript math abs() method returns an absolute value of a given number. The abs() is a static method of Math.

Syntax

The abs() method is represented by the following syntax:

Parameter

num - A number.

Return

An absolute value of a number.

JavaScript Math abs() method example

Here, we will understand abs() method through various examples.

Example 1

Let's see an example to print the absolute value of a number.

<script>
document.writeln(Math.abs(-4)+"<br>");
document.writeln(Math.abs(-7.8)+"<br>");
document.writeln(Math.abs('-4'));
</script>

Test it Now

Output:

4
7.8
4

Example 2

Let's see some cases where abs() method returns 0.

<script>
document.writeln(Math.abs(null)+"<br>");
document.writeln(Math.abs([])+"<br>");
document.writeln(Math.abs(''));
</script>

Test it Now

Output:

0
0
0

Example 3

Let's see some cases where abs() method returns NaN.

<script>
document.writeln(Math.abs("string")+"<br>");
document.writeln(Math.abs([2,3])+"<br>");
document.writeln(Math.abs());
</script>

Test it Now

Output:

NaN
NaN
NaN

Example 4

Let's understand the abs() method with your own test cases.

<script>
function display()
{
  var x=document.getElementById("num").value;
  document.getElementById("result").innerHTML=Math.abs(x);
}
</script>
<form>
  Enter a number: <input type="text" id="num">
  <input type="button"  onclick="display()" value="submit">
  </form>
  <p><span id="result"></span></p>

Test it Now

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