21-May-2026 Lesson 10 (Additional 2)(P.93)-REVTONY
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while True:
while True:
W= input("Please input your weight in kg")
H= input("Please input your height in cm")
try:
W= float(W)
H=float(H)/100
# Exit the loop because inputs are successful!
break
except ValueError:
print("please input a number!")
bmi = W / (H**2)
bmi = round(bmi,2)
if bmi <18.5:
print (f"Your BMI is: {bmi}, you're underweitghted")
elif 18.5 <=bmi<23:
print (f"Your BMI is: {bmi}, you're fit")
elif 23 <=bmi <=25:
print(f"Your BMI is: {bmi}, you're overweighted!")
else:
print(f"Your BMI is: {bmi}, you're obese!")
print('-'*40)
# NEW SECURE EXIT LOGIC:
while True:
quit_choice = input("Do you want to calculate another BMI? (y/n): ").strip().lower()
if quit_choice == 'n':
print("Thank you for using the BMI calculator. Goodbye!")
# This breaks out of the OUTER loop to close the program
break
elif quit_choice == 'y':
print("Starting next calculation...\n")
# This breaks out of the quit loop so the program can loop back to the top
break
else:
# If they typed anything else, the loop repeats and asks again
print("Invalid input! Please type exactly 'y' for Yes or 'n' for No.")
# This double-check ensures that if they chose 'n', the outer loop actually ends
if quit_choice == 'n':
break
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