BMI

def calculate_bmi(weight_kg, height_m):
    '''Calculates BMI based on weight (in kilograms) and height (in meters)'''
    bmi = weight_kg / (height_m ** 2)
    return bmi
def classify_bmi(bmi):
    """ Classifies BMI into categories (underweight, normal, overweight)."""
    if bmi < 18.5:
        return "Underweight"
    elif 18.5 <= bmi < 24.9:
        return "Normal"
    else:
        return "Overweight"

def main():
    try:
        weight = float(input("Enter your weight in kilograms: "))
        height = float(input("Enter your height in meters: "))

        bmi_result = calculate_bmi(weight, height)
        bmi_category = classify_bmi(bmi_result)

        print(f"Your BMI is {bmi_result:.2f} ({bmi_category}).")

    except ValueError:
        print("Invalid input. Please enter valid weight and height.")

if __name__ == "__main__":
    main()