# Math pi Python

In Python, `math.pi` refers to a constant variable provided by the math module that represents the mathematical constant pi (π).

The value of `math.pi` is a floating-point approximation of the mathematical constant pi, which represents the ratio of the circumference of any circle to its diameter. It is an irrational number, meaning it cannot be expressed exactly as a fraction or terminating decimals.

In Python, you can use the math module to access the mathematical constant pi (π). Here’s an example:

``````import math

# Access the value of pi
pi = math.pi

# Print the value of pi
print(pi)
``````

When you run this code, it will output the value of pi, which is approximately 3.141592653589793. You can use this value in your calculations or round it to a specific number of decimal places as needed.

## Math pi Python example

Here’s an example that demonstrates how to use the value of pi in Python:

``````import math

# Calculate the circumference of a circle with radius 5
circumference = 2 * math.pi * radius
print("The circumference of the circle is:", circumference)

# Calculate the area of a circle with radius 3
area = math.pi * radius ** 2
print("The area of the circle is:", area)

# Calculate the volume of a sphere with radius 4
volume = (4/3) * math.pi * radius ** 3
print("The volume of the sphere is:", volume)
``````

Output:

The `math.pi` constant in Python is useful for various mathematical calculations and formulas that involve circles, spheres, trigonometry, and more. It provides an accurate approximation of pi to perform precise calculations in Python programs.

Do comment if you have any doubts or suggestions on this Python Math topic.

Note: IDE: PyCharm 2021.3.3 (Community Edition)

Windows 10

Python 3.10.1

All Python Examples are in Python 3, so Maybe its different from python 2 or upgraded versions.