Calculating Circle Area and Circumference with Python

In this project, we will walk through a Python code that calculates the area and circumference of a circle. We will explain each step of the code and provide the final working code at the end.

Getting User Input

To start, we need to obtain the radius of the circle from the user. We can use the input() function to prompt the user to enter a value. Let's store the user's input in a variable called radius:

radius = int(input("Enter the radius: "))

Calculating the Area

The area of a circle can be calculated using the formula: (π * r^2), where π is a mathematical constant approximately equal to 3.14, and r is the radius. We can use this formula to calculate the area and store it in a variable called area:

area = 3.14 * radius**2

Displaying the Area

Now that we have calculated the area, let's display it to the user. We can use the print() function to show the result. To concatenate the calculated area with a string, we need to convert it to a string using the str() function:

print("The area of the circle is: " + str(area))

Calculating the Circumference

The circumference of a circle can be calculated using the formula: (2 * π * r). We will use this formula to calculate the circumference and store it in a variable called circumference:

circumference = 2 * 3.14 * radius

Displaying the Circumference

Finally, let's display the calculated circumference to the user. Similar to displaying the area, we can use the print() function and convert the circumference to a string using str():

print("The circumference of the circle is: " + str(circumference))

Final Code

Here's the complete Python code that calculates the area and circumference of a circle:

radius = int(input("Enter the radius: "))

area = 3.14 * radius**2
print("The area of the circle is: " + str(area))

circumference = 2 * 3.14 * radius
print("The circumference of the circle is: " + str(circumference))

That's it! You now have a Python code that calculates the area and circumference of a circle. Feel free to modify the code or use it as a starting point for your own projects. Happy coding!