bcsqrt

Get the square root of an arbitrary precision number (PHP 3, PHP 4, PHP 5)
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.

范例

例 317. bcsqrt() example

<?php

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

?>

参见

bcpow().