BMI calculator using java - mini project - First open source contribution project

Author: kamalanathancv

bmi-calculator/BMICalculator.java

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+// BMI CALCULATOR USING JAVA - FIRST OPEN SOURCE CONTRIBUTION THROUGH THIS PROJECT
+
+import java.util.Scanner;
+
+public class BMICalculator {
+    public static void main(String[] args) {
+        // This program calculates BMI based on user input
+
+        Scanner scanner = new Scanner(System.in);
+
+        System.out.println("Welcome to the BMI Calculator!");
+
+        // Get weight from user
+        System.out.print("Please enter your weight in kilograms: ");
+        double weight = scanner.nextDouble();
+
+        // Get height from user
+        System.out.print("Please enter your height in meters: ");
+        double height = scanner.nextDouble();
+
+        // Calculate BMI
+        double bmi = weight / (height * height);
+
+        // Print the result
+        System.out.printf("Your BMI is: %.2f\n", bmi);
+
+        // Interpret the BMI value
+        if (bmi < 18.5) {
+            System.out.println("You are underweight.");
+        } else if (bmi >= 18.5 && bmi < 25) {
+            System.out.println("You have a normal weight.");
+        } else if (bmi >= 25 && bmi < 30) {
+            System.out.println("You are overweight.");
+        } else {
+            System.out.println("You are obese.");
+        }
+
+        // Close the scanner
+        scanner.close();
+    }
+}

bmi-calculator/README.md

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+# BMI Calculator
+
+This is a simple Java program that calculates your Body Mass Index (BMI) based on your weight and height.
+
+## How to Run
+
+1. Make sure you have Java JDK 21 installed.
+2. Open a terminal in this folder.
+3. Compile the program:
+   ```
+   javac BMICalculator.java
+   ```
+4. Run the program:
+   ```
+   java BMICalculator
+   ```
+
+## What It Does
+
+- Asks you for your weight (in kilograms) and height (in meters)
+- Calculates your BMI
+- Tells you if you are underweight, normal, overweight, or obese
+
+## JDK Version
+
+- OpenJDK Runtime Environment Temurin-21 (or any OpenJDK 21)
+
+## IDE Used
+
+- Visual Studio Code (VS Code)
+
+---
+
+*This project was created as a beginner contribution for the Grow-with-Open-Source/Java-Projects repository.*