🚀 Bootcamp - Lesson 01

📝 Overview

This project is a simple Python program that calculates the total annual bonus based on a user's monthly salary and bonus percentage. The program ensures input validation and prevents common errors that could lead to incorrect calculations or crashes.

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🎯 Functionality

1. Greets the user and requests their name.
2. Prompts the user to input their salary and bonus percentage.
3. Validates input to prevent errors (e.g., negative values, non-numeric input).
4. Calculates the annual bonus, including an additional fixed amount of R$ 1000.
5. Displays the correctly formatted result.

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🛠 Code Implementation

# 1. Greet the user and request name input
name = input("Hello! Enter your name: ").strip()

# 2. Function to validate and obtain a positive numeric value
def get_value(message):
    while True:
        try:
            value = float(input(message).strip().replace(",", "."))  # Supports comma as decimal separator
            if value < 0:
                print("Error: The value cannot be negative. Please try again.")
                continue
            return value
        except ValueError:
            print("Error: Please enter a valid number.")

# 3. Request salary and bonus (percentage)
salary = get_value(f"Welcome, {name}! Enter your monthly salary: ")
bonus_percentage = get_value(f"{name}, enter your bonus percentage (e.g., 10 for 10%): ")

# 4. Calculate the total annual bonus (including 1000 fixed additional)
bonus_total = (salary * (1 + (bonus_percentage / 100))) + 1000

# 5. Display the correctly formatted result
print(f"{name}, your total annual bonus is: R$ {bonus_total:.2f}")

🐞 Bug Fixes & Improvements

Below is a list of potential issues in the previous version of the code and how they were resolved.

🐞 Bug	💥 Cause	🔧 Solution
1️⃣ Invalid Input	The user may enter a non-numeric value (e.g., "five thousand") for salary or bonus, causing a ValueError.	Use try-except to catch errors and prevent crashes.
2️⃣ Negative Values	If salary or bonus is negative, the calculation may produce incorrect results.	Ensure values are positive before processing.
3️⃣ Empty Input	Pressing Enter without typing anything causes an error when converting "" to float.	Check if input is empty before converting it.
4️⃣ Extra Spaces in Input	Input with leading/trailing spaces may cause unexpected behavior.	The .strip() function ensures clean input.
5️⃣ Formatting Issues	Printing total directly may display unformatted numbers.	Use :.2f formatting to ensure two decimal places.
6️⃣ Incorrect Bonus Calculation	The previous code assumed the bonus was a direct multiplier instead of a percentage.	Clarify input format (1.5 = 150%) and correctly apply the percentage.

🎯 Key Takeaways

✔️ Better Input Validation → Prevents crashes and incorrect calculations.
✔️ Improved User Experience → Clearer instructions and better formatting.
✔️ More Robust Calculations → Ensures bonus is applied correctly.

📌 How to Run

To run this program, make sure you have Python 3.x installed, then execute:

python main.py

👨‍💻 Author

👤 Luiz Otavio Delgado
📧 Contact: luizotavio.delgado@gmail.com
🔗 GitHub: https://github.com/luizodelgado