PHP pow() Function

In this chapter you will learn:

Definition for PHP pow() Function
Syntax for PHP pow() Function
Parameter for PHP pow() Function
Return for PHP pow() Function
Example - Raise to the power

Definition

The pow() function takes two parameters: a base and a power to raise it by.

Syntax

PHP pow() Function has the following syntax.

number pow ( number base, number exponent )

Parameter

Parameter	Is Required	Description
base	Required.	Base to use
exponent	Required.	Exponent

Return

Item	Value
Return Value	x raised to the power of y
Return Type	Integer if possible, Float otherwise

Example

You can send negative powers for the second parameter to pow() to generate roots. And the parameters need not be integers.


<?php/*  j a  v  a 2s.com*/
print pow(10,2); // 100 
print "\n";
print pow(-10, 4); // 10000 
print "\n";
print pow(10, -1);
print "\n";
print pow(10, -2);
print "\n";
print pow(10.1,2.3);
print "\n";
echo( pow(2,4) );
print "\n";
echo(pow(-2,4));
print "\n";
echo(pow(-2,-4));
print "\n";
echo(pow(-2,-3.2));
?>