Error message comes up even if input is correct. python

Question

I am trying to allow certain input with this code.

Sdepth = int(input("enter depth of slab: "))
if Sdepth != 45 or Sdepth != 38 :
    print("depth can only be 45 or 38")
    Sdepth = int(input("enter depth of slab: "))

If I input 45 or 38 print("depth can only be 45 or 38") is output when it should not.

If Sdepth is 45, it is still not 38. You mean and, not or. — L3viathan
– L3viathan, Commented Oct 2, 2019 at 8:33

buran · Accepted Answer · 2019-10-02 08:34:22Z

2

You need and, not or in this case. For example, if you enter 45, Sdepth != 38 is still True, thus the whole if condition is True. Or you can use if Sdepth not in (45, 38):

answered Oct 2, 2019 at 8:34

buran

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Comments

Simon Crane · Accepted Answer · 2019-10-02 08:34:47Z

1

Sdepth != 45 or Sdepth != 38 evaluates to True if either or Sdepth != 45 or Sdepth != 38 is True. If Sdepth is 38, then Sdepth != 45 is True.

Change the if line to this:

if Sdepth not in [38, 45]:

answered Oct 2, 2019 at 8:34

Simon Crane

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