php man page for bcsqrt

BCSQRT(3)								 1								 BCSQRT(3)

bcsqrt - Get the square root of an arbitrary precision number

SYNOPSIS
       string bcsqrt (string  $operand, [int  $scale])

DESCRIPTION
	Return the square root of the $operand.

PARAMETERS
	      o $operand
		- The operand, as a string.

	      o $
		scale  -This  optional	parameter  is used to set the number of digits after the decimal place in the result. You can also set the
		global default scale for all functions by using bcscale(3).

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

EXAMPLES
       Example #1

	      bcsqrt(3) example

	      <?php

	      echo bcsqrt('2', 3); // 1.414

	      ?>

SEE ALSO
       bcpow(3).

PHP Documentation Group 														 BCSQRT(3)