How to use round in php

The function of the round function is to round floating point numbers. The usage in PHP is "round(x,prec)", where the parameter x specifies the number to be rounded, and the parameter prec specifies the number of digits after the decimal point. .

The operating environment of this article: Windows 7 system, PHP version 7.1, DELL G3 computer

The round() function rounds floating point numbers.

Syntax

round(x,prec)

Parameters

x Optional. Specifies the number to be rounded.

prec Optional. Specifies the number of digits after the decimal point.

Description

Returns the result of rounding x according to the specified precision prec (the number of decimal digits after the decimal point). prec can also be negative or zero (default).

Tips and Notes

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

Note: The prec 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

Recommended learning: "PHP Video Tutorial"

The above is the detailed content of How to use round in php. For more information, please follow other related articles on the PHP Chinese website!