Exercise-33 Study Drill

Python
#1

I created this according to a study drill.

i = 0
numbers = []

def loop(limit):
    while i < limit:
        print(f"At the top i is {i}")
        numbers.append(i)
        i += 1
        print("Numbers now: ", numbers)
        print(f"At the bottom i is {i}")

loop(input(">>> "))

print("The numbers:")
for num in numbers:
     print(num)

But I get this error:

Traceback (most recent call last):
File " ", line 15, in
loop(x)
File " ", line 5, in loop
while i < limit:
UnboundLocalError: local variable ‘i’ referenced before assignment

Can someone please explain what is wrong?

#2

The error is telling you that ‘i’ is used before it’s referenced. This is in the loop as the scope of i = 0 is outside of your function. Move it into the loop function as it’s the only place you use it.

You will also find you’ll get a new error based on the type of ‘limit’. See if you can figure out how to ensure the type is valid. :slightly_smiling_face:

#3

Thanks, I also found out that I could use “global i” inside of ‘def’ to make it work.

Also, yes, I had to change the type to ‘int()’ or ‘float()’ because its type was initially as ‘string’.

Thanks for your help!

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