PHP round() function

PHP Math functions

Definition and Usage

The round() function rounds floating-point numbers.

Syntax

round(x,prec)
Parameter Description
x Optional. Specifies the number to be rounded.
prec Optional. Specifies the number of decimal places after the decimal point.

Description

Returns x According to the specified precision prec The rounding result of the number of decimal places after the decimal point (decimal).prec It can also be a negative number or zero (default).

Tips and Notes

Note:PHP cannot handle strings like "12,300.2" correctly by default.

Note:prec The parameter was introduced in PHP 4...

Example

<?php
echo(round(0.60));
echo(round(0.50));
echo(round(0.49));
echo(round(-4.40));
echo(round(-4.60));
?>

Output:

1
1
0
-4
-5

PHP Math functions