Home > Article > Web Front-end > Explanation of Math.round() method for rounding in JavaScript_Basic knowledge
This method returns the value of a number rounded to the nearest integer.
Grammar
Math.round( x ) ;
Here are the details of the parameters:
Return value:
Example:
<html> <head> <title>JavaScript Math round() Method</title> </head> <body> <script type="text/javascript"> var value = Math.round( 0.5 ); document.write("First Test Value : " + value ); var value = Math.round( 20.7 ); document.write("<br />Second Test Value : " + value ); var value = Math.round( 20.3 ); document.write("<br />Third Test Value : " + value ); var value = Math.round( -20.3 ); document.write("<br />Fourth Test Value : " + value ); </script> </body> </html>
This will produce the following results:
First Test Value : 1 Second Test Value : 21 Third Test Value : 20 Fourth Test Value : -20