(Beginner Question) BMI Calculator

Question

Hello there. I have some trouble identifying whats wrong. If I run this code I will get the error message that there is a Syntax error in line 2 but I can't find it.

weight = int(input())
height = float(input())
BMI = (weight/height**2)

if BMI < 18.5:
print("Underweight")
elif BMI>=18.5 and <25:
print("Normal")
elif BMI>=25 and <30:
print("Overweight")
else BMI <30:
print("Obesity")

I am really glad for any ideas. I also tried to change the weight input to float. But if I do it like this weight = float(input()) I get the Syntax errormessage for line 1.

Answer 1

Compare

1) elif BMI >= 18.5 and BMI < 25

to

2) elif BMI >= 18.5 and < 25

1) is most likely what you want to do.

Answer 2

https://code.sololearn.com/cDQGCYxXqk25/?ref=app

Answer 3

I don't see an issue in line 1 or 2. Could you copy your original code in a script on sololearn playground?

Go to Code section, click +, select Python, insert your code, save.
Come back to this thread, click +, Insert Code, sort for My Code Bits, select your code.

Also check on your if-elif-else-conditions:
– Note the usage of BMI: elif BMI >= 18.5 and BMI < 25
– same applies for the 2nd elif
– else does not take any condition, it is just the "remainder" when no condition else is met. Simple remove the condition from else (Also elif BMI < 30 wouldn't make much sense regarding the previous condition.)

Answer 4

I just editet the Code to this

weight = int(input())
height = float(input())
BMI = (weight/height**2)

if BMI < 18.5:
print("Underweight")
elif BMI>=18.5 and BMI<25:
print("Normal")
elif BMI>=25 and BMI<30:
print("Overweight")
else:
print("Obesity")

Now its working. I honestly do not fully get it, but it worked.

Answer 5

Lisa Thank you very much for your answer. Do you mean what Sreeju just did?

I understand the problem with the else condition. I changed it in the updated code. I do not understand what you mean with the elif condition. Can you explain?

Answer 6

Lisa Oh yeah, thank you. Now I can see it. I also adressed this in the updated code. Thank you very much for your time.