Calculator code issue using list

[kirt6405]

The problem is that when I choose / and input 5 and 0 (2nd number as 0) it is giving 0.0 but not printing the divisior is zero

#!/usr/bin/python3 num=input("please select operator +,-,*,/ or q to quit") while num != 'q': numlist=input("please enter at least 2 numbers ").split() numlist=[float(i) for i in numlist] total = numlist[0] del numlist[0] if num == '+': for i in numlist: total = i + total print (total) elif num == '-': for i in numlist: total = i - total print (total) elif num == '*': for i in numlist: total = i * total print (total) elif num =='/': if i in numlist ==0: print ("divisior is zero") else: for i in numlist: total = i / total print (total) num=input("please select operator +,-,*,/ or q to quit")

[topfox]

I think you need line 21 to be:

if 0 in numlist:

[kirt6405]

Thank you that helped but can you explain why cant we substiute i because i can be any number in list

I think you need line 21 to be:

if 0 in numlist:

[Yoriz]

The line

if i in numlist ==0:

will give NameError: name 'i' is not defined
if i was defined it would return True if i was in numlist and then do a comparison of True == 0 which would be False
If you want to check if something is in a list just do

numlist = [5, 0] print(0 in numlist)

Output:
True

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Thank you that helped but can you explain why cant we substiute i because i can be any number in list

You are not for looping to give i a value like in the other elif statements.

[topfox]

I believe that i is not defined at line 21, and I'm not quite sure what you are trying to do.

i could be used instead of 0, if a value had been assigned to it, like this:

i = 0 if i in numlist

the expression '0 in numlist' is evaluated as True if the value 0 matches any item in the list numlist.
the expression 'i in numlist == 0' would I suppose be evaluated as True if 'i in numlist' evaluated as False. Then 'False == 0' would be True. That means the expression 'i in numlist == 0' is equivalent to 'i not in numlist', hence you may get the opposite answer to what you expect.
I hope that makes sense!