bcpow

(PHP 4, PHP 5, PHP 7)

bcpow — 锟斤拷锟解精锟斤拷锟斤拷锟街的乘凤拷

说锟斤拷

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

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锟斤拷锟斤拷

left_operand

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right_operand

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scale

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锟斤拷锟斤拷值

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锟斤拷锟斤拷

Example #1 bcpow() 示锟斤拷

<?php

echo bcpow('4.2', '3', 2); // 74.08

?>

注锟斤拷

Note:

bcpow() may return a result with fewer digits after the decimal point than the scale parameter would indicate. This only occurs when the result doesn't require all of the precision allowed by the scale. For example:

Example #2 bcpow() scale example

<?php
echo bcpow('5', '2', 2);     // prints "25", not "25.00"
?>

锟轿硷拷

  • bcpowmod() - Raise an arbitrary precision number to another, reduced by a specified modulus
  • bcsqrt() - 锟斤拷锟解精锟斤拷锟斤拷锟街的讹拷锟轿凤拷锟斤拷