# 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.

# Python Example for Beginners

## Two Machine Learning Fields

There are two sides to machine learning:

**Practical Machine Learning:**This is about querying databases, cleaning data, writing scripts to transform data and gluing algorithm and libraries together and writing custom code to squeeze reliable answers from data to satisfy difficult and ill defined questions. It’s the mess of reality.**Theoretical Machine Learning**: This is about math and abstraction and idealized scenarios and limits and beauty and informing what is possible. It is a whole lot neater and cleaner and removed from the mess of reality.

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