BMI-Calculator.py

import time

#Define BMI function
def bodymassindex(weight, height):
    return round(weight / (height/100) ** 2, 2)

print("Welcome to the Body Mass Index (BMI) calculator!")
time.sleep(1)
print("Let's calculate your BMI")
time.sleep(1)

again = "y"

while again == "y":
    #User input
    weight = float(input("Enter your weight in kg: "))
    height = float(input("Enter your height in cm: "))

    #Display BMI 
    BMI = bodymassindex(weight, height)
    print ("Your BMI is:", BMI)

    if (BMI < 18.5):
        print("You are underweight")
    elif (BMI <= 24.9):
        print("Your weight is within the normal range")
    elif (BMI < 30):
        print("You are overweight")
    else:
        print("You are obese")
    
    while True:
        again = input("Would you like to calculate your BMI again? Y/N ").lower()

        try:
            if again == "y":
                break
            elif again == "n":
                print("Thank you for using the BMI calculator")
                break
            else:
                raise Exception("Invalid input! Answer 'Y' or 'N' ")
            
        except Exception as e:
            print(e)