bcsqrt

(PHP 4, PHP 5, PHP 7)

bcsqrt — Get the square root of an arbitrary precision number

Description

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

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.

Return Values

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

Examples

Example #1 bcsqrt() example

<?php

echo bcsqrt('2', 3); // 1.414

?>

See Also

  • bcpow() - Raise an arbitrary precision number to another