# Introduction to Pi in Python and How to use pi in Python

## Introduction to Pi in Python

The intriguing discipline of mathematics seamlessly merges with computer science. The ratio of the circumference to the diameter of a circle is represented by one of the most well-known mathematical constants, “pi.” For ages, Pi has enthralled mathematicians, scientists, and enthusiasts. In this blog, we will delve into the intriguing world of pi and explore how to use pi in Python, one of the most popular programming languages.

Let’s first learn what pi signifies before using pi in Python. Since pi is an irrational number, it cannot be written as a simple fraction and has an infinite decimal representation. Pi’s value is roughly 3.141592653589793, which is frequently rounded to 3.14 or even just 3. Knowing pi is essential because it is used in many mathematical and scientific computations.

## How to Use pi in Python.

Let’s look at a few examples to better understand how How to Use pi in Python.

**Importing the Math Module: **

We must import the ‘math’ module in order to use Python’s mathematical functions and constants. Include the following line at the start of your script in your Python environment or IDE:

import math

**Accessing Pi:**

Once the ‘`math'`

module is imported, you can access the value of pi using ‘`math.pi'`

. It provides an accurate representation of pi, allowing you to perform calculations with precision. Here’s an example of printing the value of pi:

import math print(math.pi)

#### Output:

3.141592653589793

**Calculating Circumference and Area:**

Pi is frequently used in geometry to determine the area and circumference of circles. You may easily complete these computations using Python by use pi. Let’s figure out a circle’s diameter and area using the specified radius:

import math radius = 5 circumference = 2 * math.pi * radius area = math.pi * radius ** 2 print("Circumference:", circumference) print("Area:", area)

#### Output:

Circumference: 31.41592653589793 Area: 78.53981633974483

**Trigonometric Functions:**

Pi is important in trigonometry as well. the ‘math’ module of Python has a number of trigonometric functions that accept angles expressed in radians. You can use pi to convert between degrees and radians since pi radians are equal to 180 degrees. An illustration of how to determine the sine and cosine of an angle in radians is given here:

import math angle = math.pi / 4 # 45 degrees in radians sine = math.sin(angle) cosine = math.cos(angle) print("Sine:", sine) print("Cosine:", cosine)

#### Output:

Sine: 0.7071067811865476 Cosine: 0.7071067811865476

**Random Numbers:**

The ‘`math'`

module in Python provides a random number generator called ‘`random'`

. Pi is also used in generating random numbers through the ‘`random'`

module. By multiplying random values between 0 and 1 with pi, you can obtain random numbers within the range of 0 to pi. Here’s an example:

import math import random random_number = random.random() * math.pi print("Random Number between 0 and pi:", random_number)

#### Output:

Random Number between 0 and pi: 2.452945343605773

#### Conclusion

Pi is an interesting mathematical constant that has many uses. The’math’ module in Python enables access to pi and a variety of calculations involving circles, trigonometry, and random integers. You can explore the depths of mathematics and unleash the power of this fascinating number by adding pi into your Python programs. Therefore, embrace pi’s miracles in your Python programs to open up new horizons of opportunity.