PHP: round() function

Last update on August 19 2022 21:50:39 (UTC/GMT +8 hours)

Description

The round() function is used to round a floating-point number.

Version:

(PHP 4 and above)

Syntax:

round (num1, num2, mode)

Parameters:

Name	Description	Required / Optional	Type
num1	The numeric expression whose value is to be rounded.	Required	Float
num2	The number of decimal digits to round to.	Optional	Integer
mode	Rounding mode. Possible values : PHP_ROUND_HALF_UP, PHP_ROUND_HALF_DOWN, PHP_ROUND_HALF_EVEN, PHP_ROUND_HALF_ODD.	Optional	Integer

Return value

The rounded value.

Value Type : Float.

Pictorial Presentation

php-math-round()

Example:

<?php
$round1=round(13.4);
$round2=round(13.5);
$round3=round(13.6);
$round4=round(13.6,0);
$round5=round(5.85543,2);
$round6=round(5.85543,-3);
$round7=round(6.054,2);
$round8=round(6.066,2);
echo "Round of (13,4)  is : ". $round1 . "<br />" ;
echo "Round of (13,5)  is : ". $round2 . "<br />" ;
echo "Round of (13,6)  is : ". $round3 . "<br />" ;
echo "Round of (13.6,0)  is : ". $round4 . "<br />" ;
echo "Round of (5.85543,2)  is : ". $round5 . "<br />" ;
echo "Round of (5.85543,-3) is : ". $round6 . "<br />" ;
echo "Round of (6.054,2)  is : ". $round7 . "<br />" ;
echo "Round of (6.066,2)  is : ". $round8 . "<br />" ;
?>

Output :

Round of (13,4)  is : 13
Round of (13,5)  is : 14
Round of (13,6)    is : 14
Round of (13.6,0)  is : 14
Round of (5.85543,2)  is :   5.86
Round of (5.85543,-3) is : 0
Round of (6.054,2)  is : 6.05
Round   of (6.066,2)  is : 6.07

View the example in the browser

See also

PHP Function Reference

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