# Python Built-in Methods – Python pow() Function

Raises a number to a power

## Usage

The `pow(x, y)` function calculates the value of x to the power of y ( x y ).

If a third argument z is specified, `pow(x, y, z)` function returns x to the power of y, modulus z  ( x y % z ).

## Syntax

pow(x,y,z)

 Parameter Condition Description x Required The base y Required The exponent z Optional The modulus

## pow(x, y)

If two arguments are specified, the `pow(x, y)` method returns x to the power of y ( x y ).

``````# Raise 5 to the power of 2
x = pow(5, 2)
print(x)
# Prints 25``````
``````# negative number
x = pow(-2, 3)
print(x)
# Prints -8

# float
x = pow(2.5, 2)
print(x)
# Prints 25

# complex number
x = pow(3+4j, 2)
print(x)
# Prints (-7+24j)

# Negative exponent
x = pow(2, -2)
print(x)
# Prints 0.25``````

If the exponent (second argument) is negative, the method returns float result.

You can achieve the same result using the power operator `**`.

``````x = 10**2
print(x)
# Prints 100``````

## pow(x, y, z)

If all the three arguments are specified, `pow(x, y, z)` function returns x to the power of y, modulus z  ( x y % z ).

``````# Return the value of 5 to the power of 2, modulus 3
x = pow(5, 2, 3)
print(x)
# Prints 1``````

You can achieve the same result using the power operator `**` and modulus operator `%`.

``````x = 5**2%3
print(x)
# Prints 1``````

If z is present, x and y must be of integer types, and y must be non-negative. Otherwise, the function raises exception.

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