Coding Challenge: Create a program to calculate the area of a circle given its radius.

Earlier this year, Women Who Code launched its WWCode Days of Code Challenge 2024. Participants could choose challenges ranging from machine learning and mobile to Python, cloud, data, and other emerging technologies.

I enthusiastically joined the Women Who Code Python community for their daily coding challenges. This blog series of mine named, "Coding Challenge" will serve as my documentation and accountability to consistency.

To enhance the experience for all WWCode Days of Code Challenge 2024 participants, I also crafted a nifty "checklist" or tracker. Excited to share that it's already making waves within the community! Check it out here: https://lnkd.in/dPuX7_qc

I've also published an article about Step-by-step guide on how to solve daily coding challenges.

Python Days of Code Challenge - Day 2

How It Works:

• 60 Days, 60 Questions: Dive into daily Python challenges, each marking a step closer to coding mastery. You can start anytime in between as well!

Learning Together:

• Share your solutions, ask questions, and connect with fellow coders in this thread or on social media (Twitter, LinkedIn) - or Github!

• Don't forget to tag us @WWCodePython or use the hashtags #WomenWhoCodePython #PythonDaysofCode so we can celebrate your achievements!

Bonus:

• React to today’s question if you’d like us to solve this LIVE in our upcoming Python Code Jam Sessions

Today's Challenge:

• Create a program to calculate the area of a circle given its radius.

Notes

• The formula for calculating the area of a circle is given by: Area = pi radius Area = π radius

• Here: π (pi) is a mathematical constant approximately equal to 3.14159. radius means you square the length of the radius (multiply it by itself).

• So, in simpler terms, to find the area of a circle, you take the value of pi, multiply it by the square of the radius.

Solution

# Challenge: Create a program to calculate the area of a circle given its radius.

# 1. Understand the Problem
# Inputs:
# The input is the radius of the circle.

# Outputs:
# The output is the area of the circle.

# Restrictions:
# - The input should be a numerical value representing the radius.
# - The output should be a numerical value representing the area.

# 2. Examples

# Example 1:
# Input: 2
# Output: 12.566370614359172 (calculated area of a circle with a radius of 2)

# Example 2:
# Input: 4
# Output: 50.26548245743669 (calculated area of a circle with a radius of 4)


# 3. Pseudocode

# # What is the formula of finding the area of a circle
# # Area = pi ** radius
# # Area = π ** radius

# Create a pi variable and assign it to its value 3.14159
pi = 3.14159

# Use input to get the radius from the user from terminal
# input's value is string, convert it to integer
radius = int(input("What is the radius of the circle? "))

# Write the formula in a python way
area_of_circle = pi * radius ** 2

# print the result
print(area_of_circle)

# 4. Solve/Simplify

pi = 3.14159
radius = int(input("What is the radius of the circle? "))

area_of_circle = pi * radius ** 2
print(area_of_circle)


# 5. Refactor or Look Back

# def area_of_circle(radius):
#     if type(radius) not in [int, float]:
#         return "Invalid input. Please input integer or float type."

#     pi = 3.14159
#     areaOfCirle = pi * radius ** 2
#     return areaOfCirle

# 6. Code & Test

# Test with Valid Input
radius_valid = 5
area_valid = area_of_circle(radius_valid)
print(f"The area of a circle with radius {radius_valid} is {area_valid}")

# Test with Invalid Input
radius_invalid = "invalid"
area_invalid = area_of_circle(radius_invalid)
print(area_invalid)

# Test with Floating-Point Input
radius_float = 3.5
area_float = area_of_circle(radius_float)
print(f"The area of a circle with radius {radius_float} is {area_float}")

# Test with Negative Input
radius_negative = -6
area_negative = area_of_circle(radius_negative)
print(f"The area of a circle with radius {radius_negative} is {area_negative}")

# Test with Zero Input
radius_zero = 0
area_zero = area_of_circle(radius_zero)
print(f"The area of a circle with radius {radius_zero} is {area_zero}")

# Test with Large Input
radius_large = 1000
area_large = area_of_circle(radius_large)
print(f"The area of a circle with radius {radius_large} is {area_large}")

Goals I achieved

Daily goals:

• [x] Code Day 2

• [x] Write an awesome commit message and push your code!

• [x] Continue writing on your documentation.

• [x] Share your wins!

• [x] Take care of yourself: pause, stretch, hydrate. More on WWCode Code of Balance.

Find the GitHub repo here.

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