How to exit from a python program without using libraries and modules

Question

I have to check if the input year is a a valid 4 digit no. Which isn't a float value or has more than 4 characters. The input is from a file dictionary type.

If not I want to exit the program and don't want to continue with the steps and functions after.

But the only challenge is I'm trying to do it without the use of libraries like sys etc. Is this possible in Python?

@tdelaney doesn't work for me. The program is not terminated — Emma
– Emma, Commented May 1, 2020 at 1:54
Sure it gets called? Try placing a print statement just before exit, to verify it gets evaluated. — Heap Underflow
– Heap Underflow, Commented May 1, 2020 at 2:17

usher · Accepted Answer · 2020-05-01 01:56:57Z

1

try to use:

exit("some message")

it is a built in function

answered May 1, 2020 at 1:56

usher

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Comments

arthurkwu · Accepted Answer · 2020-05-01 01:53:23Z

0

You can check if the input is 4 digits or not by using input<10000 and input>999. You can check if the input is a float or not by using the type keyword. So, your program that you described would look something like this:

if x>999 and x<10000:
  if type(x) != float:
    print("Valid")
  else:
    print("Invalid")
else:
  print("Invalid")

Hope this helps!

answered May 1, 2020 at 1:53

arthurkwu

1

1 Comment

Emma Over a year ago

Need to exit from the program.

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