Python BMI Calculator Project - Solutions and Explanations
BMI Calculator:
Develop a Body Mass Index calculator based on user input.
Input values:
User provides weight (in kilograms) and height (in meters).
Output value:
Calculated Body Mass Index (BMI) value and the corresponding BMI category.
Example:
Input values: Enter weight (in kilograms): 70 Enter height (in meters): 1.75 Output value: BMI: 22.9 Category: Normal Weight
Here are two different solutions for a Body Mass Index (BMI) calculator in Python. The BMI is calculated based on user input for weight (in kilograms) and height (in meters), and the corresponding BMI category is determined.
Solution 1: Basic Approach using Functions
Code:
Output:
Enter weight (in kilograms): 70 Enter height (in meters): 1.76 BMI: 22.6 Category: Normal Weight
Enter weight (in kilograms): 83 Enter height (in meters): 1.74 BMI: 27.4 Category: Overweight
Explanation:
- Defines two functions: 'calculate_bmi()' to compute the BMI and 'determine_bmi_category()' to categorize the BMI value.
- The 'main()' function handles user input, calls the other functions to compute and categorize the BMI, and prints the result.
- This solution is simple and straightforward but less organized for expansion or reuse in larger projects.
Solution 2: Using a Class-Based approach for Organization and Reusability
Code:
Output:
Enter weight (in kilograms): 72 Enter height (in meters): 1.76 BMI: 23.2 Category: Normal Weight
Enter weight (in kilograms): 85 Enter height (in meters): 2 BMI: 21.2 Category: Normal Weight
Explanation:
- Defines a 'BMICalculator' class to encapsulate all the functionality related to BMI calculation and categorization.
- The '__init__' method initializes the class with user-provided weight and height.
- The 'calculate_bmi()' method computes the BMI, while ‘determine_bmi_category()’ determines the category based on the computed BMI.
- The 'display_results()' method handles the complete process of calculating and displaying the BMI and its category.
- This approach follows Object-Oriented Programming (OOP) principles, making the code more modular, reusable, and easier to extend.
Note:
Both solutions effectively calculate and categorize BMI based on user input, with Solution 1 providing a basic function-based approach and Solution 2 offering a more structured, class-based design for better organization and scalability.