In this article, we will learn about Pi in Python and how to use it in a python program.

**Pi** (π) is a mathematical constant that is defined as the ratio of a circle’s circumference to its diameter.

In Python we can use two modules to use Pi:

- math module
- numpy module

## Using math module

To use **Pi** (π) in python, we have to import `math`

module and use the `math.pi`

method. It will return the value of pi i.e **3.141592653589793**.

The `math`

is the **in-built** module in python to perform mathematical tasks. It provides different set of methods and constants to work with mathematical operations.

**Example:**

```
import math
print(math.pi)
```

**Output:**

`3.141592653589793`

It returns a float value of the Pi constant.

## Using Numpy module

We can also use the `numpy`

module to use **Pi** in Python.

Numpy is a python library that has lots of high-level mathematical functions to perform different math operations.

It also provides us with the `numpy.pi`

method, which can be used to work with **Pi** in our python program.

To use `numpy.pi`

, we have to import the `numpy`

module first in our program.

**Example:**

```
import numpy as np
print(np.pi)
```

**Output:**

`3.141592653589793`

It will also return a floating value of the constant **Pi**.

Note:If numpy is

not installedin your computer, use`pip install numpy`

command to install and thenimportit into your project.

**Conclusion:**

Here, we learned how to use Pi using two different methods in Python i.e using **math.pi** and **numpy.pi** method.

The math module is in-built in python, however, to use the Numpy module we have to install it using `pip`

.

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