PHP Australia Conference 2015

gmp_sqrtrem

(PHP 4 >= 4.0.4, PHP 5)

gmp_sqrtremSquare root with remainder

Description

array gmp_sqrtrem ( resource $a )

Calculate the square root of a number, with remainder.

Parameters

a

The number being square rooted.

It can be either a GMP number resource, or a numeric string given that it is possible to convert the latter to a number.

Return Values

Returns array where first element is the integer square root of a and the second is the remainder (i.e., the difference between a and the first element squared).

Examples

Example #1 gmp_sqrtrem() example

<?php
list($sqrt1$sqrt1rem) = gmp_sqrtrem("9");
list(
$sqrt2$sqrt2rem) = gmp_sqrtrem("7");
list(
$sqrt3$sqrt3rem) = gmp_sqrtrem("1048576");

echo 
gmp_strval($sqrt1) . ", " gmp_strval($sqrt1rem) . "\n";
echo 
gmp_strval($sqrt2) . ", " gmp_strval($sqrt2rem) . "\n";
echo 
gmp_strval($sqrt3) . ", " gmp_strval($sqrt3rem) . "\n";
?>

The above example will output:

3, 0
2, 3
1024, 0

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