The pow() function in PHP is used to calculate the power of a number, raising a base number to the exponent provided.

Syntax:

pow(base, exponent)

• base: The number to be raised to the power of.
• exponent: The power to which the base number will be raised.

Examples:

1. Basic Usage:

<?php
echo pow(2, 3);  // 2 raised to the power of 3 (2^3)
?>

Output:

8

Explanation: 2^3 = 2 * 2 * 2 = 8

2. Using Float Values:

<?php
echo pow(5.5, 2);  // 5.5 raised to the power of 2
?>

Output:

30.25

Explanation: 5.5^2 = 5.5 * 5.5 = 30.25

3. Using Negative Exponent:

<?php
echo pow(2, -3);  // 2 raised to the power of -3
?>

Output:

0.125

Explanation: 2^-3 = 1 / (2^3) = 1 / 8 = 0.125

4. Raising a Negative Number:

<?php
echo pow(-2, 3);  // -2 raised to the power of 3
?>

Output:

-8

Explanation: (-2)^3 = -2 * -2 * -2 = -8

5. Raising Zero to Any Power:

<?php
echo pow(0, 5);  // 0 raised to the power of 5
?>

Output:

0

Explanation: 0^5 = 0

Notes:

• The pow() function returns a float value.
• If the exponent is negative, it calculates the reciprocal of the base raised to the positive exponent.