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Floor function in PHP

The floor() is an inbuilt function of PHP, which is used to round numbers down to the nearest integer if necessary, and returns the result. This function always returns a float number as range of the next lowest integer value (float). It is available in PHP 4 and above.

Syntax of PHP floor()
floor ( float $num ) : float

Here, $num is the number to be rounded down.





Example of Floor function

These are the some examples of floor() function -

<?php
$a=12;
$b=-121.02;
$c=103.03;
$d=-230;

$x1=floor($a);
$x2=floor($b);
$x3=floor($c);
$x4=floor($d);

echo "Floor value of $a is $x1<br />";
echo "Floor value of $b is $x2<br />";
echo "Floor value of $c is $x3<br />";
echo "Floor value of $d is $x4<br />";
?>
Output of the above code -
Floor value of 12 is 12
Floor value of -121.02 is -122
Floor value of 103.03 is 103
Floor value of -230 is -230




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