bcsqrt

(PHP 4, PHP 5, PHP 7)

Get the square root of an arbitrary precision number

string bcsqrt ( string $operand [, int $scale = 0 ] )

Return the square root of the operand.

Parameters:

operand

The operand, as a string.

scale

This optional parameter is used to set the number of digits after the decimal place in the result. If omitted, it will default to the scale set globally with the bcscale() function, or fallback to 0 if this has not been set.

Returns:

Returns the square root as a string, or NULL if operand is negative.

Examples:

bcsqrt() example

<?php

echo bcsqrt('2', 3); // 1.414

?>