How Can I Fix The Code ?

Question

I want to print "Try Again" in this code if the user doesnt write an integrer between 0 and 20. The first print works though but i dont want to print everything at once and want to learn a new technique...
https://code.sololearn.com/cNIcue4m1DIK/?ref=app

Answer 1

What I understand by your problem statement is
i) If the user enters a number €[0,20] and
the number is composite then yes
gets printed
ii)if the user enters a number €[0,20] and
the number is not composite then no
gets printed
iii)if user enters a number < 0 and > 20 then Try again gets printed

find below the modification of your code:

num = (int)(input())
composite = [4,6,8,9,10,12,14,15,16,18,20]
if(num in composite):
print('yes')
elif(num not in composite and (num >= 0 and num <=20 )):
print('no')
else:
print('Try Again')