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JavaScript Math sqrt() Method

JavaScript Math sqrt() Method with example, javascript math methods, abs() method, round() method, ceil() method, floor() method, pow() method, random() method, sqrt() method, max() method, min() method, log() method, sin() method, cos() method, tan() method etc.

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JavaScript Math sqrt() method

The JavaScript math sqrt() method returns the square root of a number. If the provided number is negative, it returns NaN.

Syntax

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

Math.sqrt(num)

Parameter

num - A number.

Return

The square root of the given number.

JavaScript Math sqrt() method example

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

Example 1

Let's see an example to print square root of the given numbers.

<script>
document.writeln(Math.sqrt(16)+ "<br>");
document.writeln(Math.sqrt(12));
</script>
Test it Now

Output:

4
3.4641016151377544

Example 2

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

<script>
document.writeln(Math.sqrt()+ "<br>");
document.writeln(Math.sqrt(-9));
</script>
Test it Now

Output:

NaN
NaN

Example 3

Here, you can test sqrt() method with your own test cases.

<script>
function display()
{
  var x=document.getElementById("num").value;
document.getElementById("result").innerHTML=Math.sqrt(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
Next TopicJavaScript Math




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