PHP5中文手册·Raise an arbitrary precision number to another -- 追寻梦想＞编程乐园＞PHP 编程

string bcpow ( string $left_operand , string $right_operand [, int $scale ] )

Raise left_operand to the power right_operand .

left_operand: The left operand, as a string.
right_operand: The right operand, as a string.
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().

Returns the result as a string.

Example#1 bcpow() example


<?php

echo bcpow('4.2', '3', 2); // 74.08

?>


	PHP5中文手册 bcmul bcpowmod BC math PHP Manual bcpow (PHP 4, PHP 5) bcpow — Raise an arbitrary precision number to another 说明 string bcpow ( string `$left_operand` , string `$right_operand` [, int `$scale` ] ) Raise `left_operand` to the power `right_operand` . 参数 `left_operand` The left operand, as a string. `right_operand` The right operand, as a string. `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(). 返回值 Returns the result as a string. 范例 Example#1 bcpow() example `<?php echo bcpow('4.2', '3', 2); // 74.08 ?>` 参见 bcpowmod() bcsqrt() bcmul bcpowmod BC math PHP Manual

bcpow