A simple BMI (Body Mass Index) Calculator implemented in HTML, CSS, and JavaScript.

The BMI Calculator is a web application that allows users to calculate their Body Mass Index based on their weight and height. It provides feedback on whether the user is underweight, normal and healthy, or overweight.

• Calculate BMI based on weight and height.
• Display a result message indicating whether the user is underweight, normal and healthy, or overweight.
• Input validation to ensure that valid numbers are provided for weight and height.

1. Open the index.html file in a web browser.
2. Enter your height (in centimeters) and weight (in kilograms).
3. Click the "Calculate" button to see the BMI result.

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