fpow

(PHP 8 >= 8.4.0)

fpow — Raise one number to the power of another, according to IEEE 754

说明

fpow(float $num, float $exponent): float

Returns the floating point result of raising num to the power of exponent. If num is zero and exponent is less than zero, then INF is returned.

参数

num
The base to use.
exponent
The exponent.

返回值

Returns a float corresponding to $num$exponent.

示例

示例 #1 fpow() example

<?php
var_dump(fpow(10, 2));
var_dump(fpow(0, -3));
var_dump(fpow(-1, 5.5));
?>

以上示例会输出：

float(100)
float(INF)
float(NAN)

参见

  • Exponentiation operator **
  • pow() - 指数表达式
  • fdiv() - Divides two numbers, according to IEEE 754
  • fmod() - 返回除法的浮点数余数