To round a number to 1 decimal place in JavaScript, use the toFixed() method.
The following is the syntax, wherein digits are the number of digits to appear after the decimal poin −
number.toFixed( [digits] )
Example
You can try to run the following code to round a number to 1 decimal places in JavaScript −
<html> <head> <title>JavaScript toFixed() Method</title> </head> <body> <script> var num = 488.234; document.write("num.toFixed(1) is : " + num.toFixed(1)); document.write("<br />"); </script> </body> </html>