app.py

import gradio as gr

# BMI Calculation function
def calculate_bmi(weight, height):
    try:
        weight = float(weight)
        height = float(height)

        if height <= 0 or weight <= 0:
            return "❌ Height and weight must be greater than zero."

        bmi = weight / (height ** 2)

        if bmi < 18.5:
            category = "Underweight"
        elif 18.5 <= bmi < 24.9:
            category = "Normal weight"
        elif 25 <= bmi < 29.9:
            category = "Overweight"
        else:
            category = "Obese"

        return f"📊 Your BMI is: {bmi:.2f} ({category})"

    except Exception as e:
        return f"❌ Error: {str(e)}"

# Gradio interface
demo = gr.Interface(
    fn=calculate_bmi,
    inputs=[
        gr.Textbox(label="Weight (kg)", placeholder="Enter your weight in kg"),
        gr.Textbox(label="Height (m)", placeholder="Enter your height in meters")
    ],
    outputs="text",
    title="⚖️ BMI Calculator",
    description="Enter your weight (kg) and height (m) to calculate your Body Mass Index."
)

if __name__ == "__main__":
    demo.launch()