JavaScript toPrecision method | format a number to a specific precision or length

JavaScript toPrecision is used to format a number to a specific precision or length. Basically, it’s a specified length of number.

Note: JS toPrecision method returns a string representing the Number object to the specified precision/length.



Example of JavaScript toPrecision method

Example of How to JavaScript Format a number into a specified length.

<!DOCTYPE html> 
            <script language="JavaScript">
                var num = 98.9614;
                var n = num.toPrecision(2);


JavaScript toPrecision method

What if JavaScript decimal precision more than the actual number?

At this condition a decimal point and nulls (zero) are added to create the specified length. See below example:-

<script language="JavaScript">
         var num = 98.33;
         var n = num.toPrecision(7);

Output: 98.33000

Do comment if you have any doubts and suggestions on this tutorial.

Note: The All JS Examples codes are tested on the Firefox browser and the Chrome browser.

OS: Windows 10

Code: HTML 5 Version

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