PHP round() Function
Example
Round numbers:
<?php
echo(round(0.60) . "<br>");
echo(round(0.50) . "<br>");
echo(round(0.49) . "<br>");
echo(round(-4.40) . "<br>");
echo(round(-4.60));
?>
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Definition and Usage
The round() function rounds a floating-point number.
Tip: To round a number UP to the nearest integer, look at the ceil() function.
Tip: To round a number DOWN to the nearest integer, look at the floor() function.
Syntax
round(number,precision,mode);
| Parameter | Description |
|---|---|
| number | Required. Specifies the value to round |
| precision | Optional. Specifies the number of decimal digits to round to. Default is 0 |
| mode | Optional. Specifies a constant to specify the rounding mode:
|
Technical Details
| Return Value: | The rounded value |
|---|---|
| Return Type: | Float |
| PHP Version: | 4+ |
| PHP Changelog: | PHP 5.3: The mode parameter was added |
More Examples
Example 1
Round numbers to two decimals:
<?php
echo(round(4.96754,2) . "<br>");
echo(round(7.045,2) . "<br>");
echo(round(7.055,2));
?>
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Example 2
Round numbers using the constants:
<?php
echo(round(1.5,0,PHP_ROUND_HALF_UP) . "<br>");
echo(round(-1.5,0,PHP_ROUND_HALF_UP) . "<br>");
echo(round(1.5,0,PHP_ROUND_HALF_DOWN) . "<br>");
echo(round(-1.5,0,PHP_ROUND_HALF_DOWN) . "<br>");
echo(round(1.5,0,PHP_ROUND_HALF_EVEN) . "<br>");
echo(round(-1.5,0,PHP_ROUND_HALF_EVEN) . "<br>");
echo(round(1.5,0,PHP_ROUND_HALF_ODD) . "<br>");
echo(round(-1.5,0,PHP_ROUND_HALF_ODD));
?>
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PHP Math Reference
