PHP Manual: Square root with remainder

Description

array gmp_sqrtrem(GMPintstring $num)

Calculate the square root of a number, with remainder.

Parameters

num

The number being square rooted.

A GMP object, an int or a numeric string.

Return Values

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