bcsqrt
(PHP 3, PHP 4 , PHP 5)
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
?>
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See also bcpow().