In this tutorial, you shall learn about Arithmetic Exponentiation Operator in PHP, its syntax, and how to use this operator in PHP programs, with examples.

## PHP Exponentiation

PHP Arithmetic Exponentiation Operator takes two numbers as operands and returns the result of the first number raised to the power of second number.

## Symbol

`**` symbol is used for Exponentiation Operator.

## Syntax

The syntax for Exponentiation Operator is

`operand_1 ** operand_2`

The operands could be of any numeric datatype, integer or float.

## Examples

### 1. Integer raised to the Power (Exponent) of Integer

In the following example, we take integer values in `\$x` and `\$y`, and find `\$x` raised to the power `\$y`.

PHP Program

```<?php
\$x = 5;
\$y = 4;

\$output = \$x ** \$y;

echo "x = \$x" . "<br>";
echo "y = \$y" . "<br>";
echo "x ** y = \$output";
?>```

Output

### 2. Float value raised to the power of Integer

In the following example, we take floating point value in `\$x` and integer value `\$y`, and raise `\$x` to the power `\$y`.

PHP Program

```<?php
\$x = 3.14;
\$y = 2;

\$output = \$x ** \$y;

echo "x = \$x" . "<br>";
echo "y = \$y" . "<br>";
echo "x ** y = \$output";
?>```

Output

### 3. Float value raise to the power of Float value

In the following example, we take floating point values in `\$x` and in `\$y`, and find `\$x ** \$y`.

PHP Program

```<?php
\$x = 3.14;
\$y = 2.1;

\$output = \$x ** \$y;

echo "x = \$x" . "<br>";
echo "y = \$y" . "<br>";
echo "x ** y = \$output";
?>```

Output

## Conclusion

In this PHP Tutorial, we learned how to use Arithmetic Exponentiation Operator to raise a number to the power of another number.