JavaScript Math sqrt() Method

The JavaScript Math sqrt( ) Method in JavaScript is used to square the root of the number passed as a parameter to the function. 

Syntax:

Math.sqrt(value)

Parameters: This method accepts a single parameter as mentioned above and described below: 

• Value: which holds the number whose square root is to be calculated.

Returns: Square root of the number passed as a parameter.

Below is an example of the Math sqrt() Method. 

Example:

javascript

<script type="text/javascript">
    console.log(Math.sqrt(-2));
    console.log(Math.sqrt(-2.56));
</script>

Output:

NaN
NaN 

Example 1:

Input : Math.sqrt(4)
Output : 2

Example 2:

Input : Math.sqrt(-4)
Output : NaN

Errors and Exceptions:

• A non-numeric string passed as a parameter returns NaN
• An array with more than 1 integer passed as a parameter returns NaN
• A negative number passed as a parameter returns NaN
• An empty string passed as a parameter returns NaN
• An empty array passed as a parameter returns NaN

More codes for the above method are as follows: 

Program 1:

javascript

<script type="text/javascript">
    console.log(Math.sqrt(2) + "<br>");
    console.log(Math.sqrt(2.56));
</script>

Output:

1.4142135623730951
1.6

Program 2:

javascript

<script type="text/javascript">
    console.log(Math.floor("Geeksforgeeks"));
</script>

Output:

NaN

Program 3:

javascript

<script type="text/javascript">
    console.log(Math.floor(7.2+9.3));
</script>

Output:

4.06201920231798

We have a complete list of Javascript Math Objects methods, to check those please go through this Javascript Math Object Complete reference article.

Supported Browsers:

• Google Chrome 1 and above
• Internet Explorer 3 and above
• Firefox 1 and above
• Opera 3 and above
• Safari 1 and above

We have a Cheat Sheet on Javascript where we covered all the important topics of Javascript to check those please go through Javascript Cheat Sheet-A Basic guide to JavaScript.