Round() function :

The round() function is used to find rounds a float number. It has three parameters and returns the round value.

Syntax:

Parameter	Description	Optional/Required
number	Specify the value to round	Required
Precision	Specify the number of decimal digits to round to.	Optional
Mode	Specify the mode in which rounding occurs. PHP_ROUND_HALF_UP PHP_ROUND_HALF_DOWN PHP_ROUND_HALF_EVEN PHP_ROUND_HALF_ODD	Optional

Example1

<?php
echo "Befor using round() function : 3.96754,2";
echo "<br>"."After using round() function : ".(round(3.96754,2));
?>

Output:

Befor using round() function : 3.96754,2
After using round() function : 3.97

Example2

<?php
echo "Befor using round() function : 7.045,2";
echo "<br>"."After using round() function : ".(round(7.045,2));
?>

Output:

Befor using round() function : 7.045,2
After using round() function : 7.05

Example3

<?php
echo "Befor using round() function : 7.055,2";
echo "<br>"."After using round() function : ".(round(7.055,2));
?>

Output:

Befor using round() function : 7.055,2
After using round() function : 7.06

Example4

<?php
echo(round(1.6,0,PHP_ROUND_HALF_UP) . "<br>");
echo(round(-1.6,0,PHP_ROUND_HALF_UP) . "<br>");

echo(round(1.6,0,PHP_ROUND_HALF_DOWN) . "<br>");
echo(round(-1.6,0,PHP_ROUND_HALF_DOWN) . "<br>");

echo(round(1.6,0,PHP_ROUND_HALF_EVEN) . "<br>");
echo(round(-1.6,0,PHP_ROUND_HALF_EVEN) . "<br>");

echo(round(1.6,0,PHP_ROUND_HALF_ODD) . "<br>");
echo(round(-1.6,0,PHP_ROUND_HALF_ODD));
?>

Output: