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# compare versions of random challenge

The first version is the right version to pass. Following a second version which will not pass. I do not understand why I cant use the second version? Can someone explain why this will be interpreted wrongly?

even.py
```# right alternative
import random
start = 5
def even_odd(num):
return not num % 2
while start:
randint = random.randint(1, 99)
if even_odd(randint):
print("{} is even".format(randint))
else:
print("{} is odd".format(randint))
start -= 1

# questioned alternative
import random
start = 5
def even_odd(num):
return not num % 2
while start:
randint_1 = random.randint(1,99)
if randint_1 = even_odd(num):
print("{} is odd".format(randint_1))
else:
print("{} is odd".format(randint_1)
start -= 1
```

There are quite a few issues in the second version. Most of which are found in this line of code:

```if randint_1 = even_odd(num):
```

There are three issues with the line:

1. You use the = (assignment) operator instead of the == (equals) operator, which means that you aren't actually doing a comparison like you intend to do.

2. You make reference to a variable called `num` which does not exist inside your `while` loop.

3. `even_odd` does not return a number, it returns a Boolean value (`True` or `False`), so the comparison would always be `False`.

The other issues with the code as a whole is that you print `"{} is odd"` for both odd and even numbers, and you are missing a closing parenthesis on the second `print` line.

If you have any further questions or want clarification on something I said then feel free to reply with more questions. I'll try to clarify anything I can.

Thanks. Regarding 2: If I put the def even_odd(num) inside the while loop, it could be used since it is defined here? (I thought that in python you did not need to define locally?)

Regarding 3, I still do not get why (given that num was defined inside the while loop) while start: randint_1 = random.randint(1,99) if randint_1 = even_odd(num): print("{} is odd".format(randint_1)) -will not take the boolean value as is done in while start: randint = random.randint(1, 99) if even_odd(randint): print("{} is odd".format(randint))