If a '-' contain in int input it will print something [closed]

Question

well what im trying to do its when you input a "-Number" it will print something

and this the error im getting:

Traceback (most recent call last):
  File "main.py", line 10, in <module>
    if "-" in use:
TypeError: argument of type 'int' is not iterable

this is my code

n1 = 800
use = []
use2 = []

while use != n1:
  use = int(input("Money: "))
  use2.append(use)
  print("The money that left:",800 - sum(use2))

  if "-" in use:
    print('ok')

Answer 1

n1 = 800
use = []
use2 = []

while use != n1:
  use = input("Money: ")
  use2.append(int(use))
  print("The money that left:",800 - sum(use2))

  if "-" in use:
    print('ok')

Worked for me!

Answer 2

The line if "-" in use attemps to see if the character "-" is contained in the use variable by iterating over it's characters, and that would work if the use variable was a string, but since integers aren't iterable, an error occurs. Just check if the use variable is below zero, since all negative integers have a - in front of them. This should work for you:

n1 = 800
use = []
use2 = []

while use != n1:
  use = int(input("Money: "))
  use2.append(use)
  print("The money that left:",800 - sum(use2))

  if use < 0:
      print('ok')