round()

The round() returns an integer or a float to the nearest whole number or to the specified decimal precision.

Syntax

$roundedNumber = round($number, $decimals, $roundMode);

• $number: the value to be rounded.
• $decimals: the number of decimals or precision required.
• $roundMode: an argument that accepts four constants to determine the rounding mode that include PHP_ROUND_HALF_UP, PHP_ROUND_HALF_DOWN, PHP_ROUND_HALF_EVEN, PHP_ROUND_HALF_ODD.

Examples

The example below demonstrates the use of the round() function to convert a float into the nearest whole number.

<?php
  $roundedNumber = round(99.75);
  echo $roundedNumber;
?>

This will result in the following output:

100

The example below demonstrates the use of the round() function to convert a float to 2 decimal numbers.

<?php
  $roundedNumber = round(99.754321, 2);
  echo $roundedNumber;
?>

This will result in the following output:

99.75

Codebyte Example

The codebyte below uses the round() function to round off pi to 3 decimal places:

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