bcsqrt

(PHP 3, PHP 4 )

bcsqrt -- Get the square root of an arbitrary precision number

Description

string bcsqrt ( string operand [, int scale])

Return the square root of the operand. The optional scale parameter sets the number of digits after the decimal place in the result.

例子 1. bcsqrt() example
<?php echo bcsqrt(2, 3); // 1.414 ?>