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pow

Description

The pow of Math for PHP exponential expression.

Syntax

pow(
    mixed $num,
    mixed $exponent
): int|float|object

Parameters

num

The base to use.

exponent

The exponent.

Return

num raised to the power of exponent. If both arguments are non-negative integers and the result can be represented as an integer, the result will be returned with int type, otherwise it will be returned as a float.

PHP-Extensions may override the behaviour of this operation and make it return an object.

Examples

1 · int

<?

$num = 2;
$exponent = 4;

$return = pow($num, $exponent);

var_dump($return);

int(16)

2 · float

<?

$num = 2;
$exponent = -4;

$return = pow($num, $exponent);

var_dump($return);

float(0.0625)

3 · object

<?

$num = new GMP("2");
$exponent = new GMP("4");

$return = pow($num, $exponent);

var_dump($return);

object(GMP)#3 (1) {
  ["num"]=>
  string(2) "16"
}

4 · ** · int

<?

$num = 2;
$exponent = 4;

$return = $num ** $exponent;

var_dump($return);

int(16)

5 · ** · float

<?

$num = 2;
$exponent = -4;

$return = $num ** $exponent;

var_dump($return);

float(0.0625)

6 · ** · object

<?

$num = new GMP("2");
$exponent = new GMP("4");

$return = $num ** $exponent;

var_dump($return);

object(GMP)#3 (1) {
  ["num"]=>
  string(2) "16"
}