Lab 4.0.2

Objective

In this lab, you'll create a Java program that calculates the Body Mass Index (BMI) given a person's weight in kilograms and height in meters. This practical application will help you understand how to use mathematical formulas in programming and interpret the results in a real-world context.

Prerequisites

• Basic understanding of Java programming
• Familiarity with variables, data types, and arithmetic operations in Java
• Knowledge of conditional statements in Java

What You'll Achieve

By completing this lab, you will:

• Gain experience in implementing health-related calculations in Java
• Practice using arithmetic operations and Math functions
• Enhance your skills in conditional logic for result interpretation
• Learn to format and display results effectively

Assignment Instructions

1. Calculate the BMI using the formula: BMI = weight / (height * height).
2. Round the BMI to one decimal place for display purposes.
3. Interpret the BMI result using the following categories:
   • Below 18.5: Underweight
   • 18.5 - 24.9: Normal weight
   • 25.0 - 29.9: Overweight
   • 30.0 and above: Obese
4. Display the calculated BMI and its interpretation.
5. (Optional) Add input validation to ensure weight and height are positive numbers.

Example Output

Weight: 70.0 kg
Height: 1.75 m
BMI: 22.9
Interpretation: Normal weight

Starter Code

package academy.javapro.lab;

public class BMICalculator {
    public static void main(String[] args) {
        // Predefined weight and height
        double weightInKg = 70.0;
        double heightInMeters = 1.75;

        // TODO: Implement BMI calculation and interpretation here
    }
}

Hints

• Use Math.pow(height, 2) as an alternative to height * height for squaring.
• Remember to handle potential division by zero if height is zero.
• Use conditional statements (if-else) to determine the BMI category.
• You can use String.format("%.1f", bmi) to round the BMI to one decimal place.

Remember, the goal is to learn and have fun! Don't hesitate to ask for help if you get stuck.

Submission Instructions:

1. Fork the repository
2. Clone your fork
3. Navigate into the repository
4. Implement the required methods
5. Test your implementation with various inputs
6. Git add, commit, and push to your fork
7. Submit a pull request
   • Add a title clearly describing your changes
   • In the comment, briefly explain your implementation approach and any challenges you faced