CODEWITHSUNDEEP
python
Maksim Pyatigorsky
Maksim Pyatigorsky

Reputation: 9

Multiple conditions If statement python doesn't work

I can't find what's wrong but my next code doesn't work:

if finalsum!=0 and (x[0]!='-' or x[0]!='+'):

Do something...

I need to add 2 more conditions If I try only one AND, the code works, if I add the OR, nothing happens.

Also I've tried few more ways to write it and it doesn't work as well.

Upvotes: 0

Views: 318

Answers (1)

gspr
gspr

Reputation: 11227

The x[0]!='-' or x[0]!='+' condition is vacuous. It is always true.

If x[0] is anything other than '-', then first part of the condition is true, so the whole condition is true. If x[0] is anything other than '+', such as for example '-', then the second part of the condition is true, so the whole condition is true. Thus the whole condition is true nomatter the value of x[0].

Upvotes: 4

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