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Python Python Basics (2015) Letter Game App Even or Odd Loop

Didier Borel
Didier Borel
2,837 Points
Posted by Didier Borel
Didier Borel
2,837 Points

even odd

every time i get to the 3 rd step , I get the error message, task 1 no longer passing. can someone help me pls. what is wrong with my code

even.py 
import random
start=5
def even_odd(num):
if num % 2==0:
    return True
    else:
    return False
    while randon.randint(1,99)==True:
        print ("{} is even").format.random.randint(1,99)
    else:
        print ("{} is odd").format.random.randint(1,99)
    start=start-1

2 Answers

Alexander Davison
Alexander Davison
65,469 Points 
import random

def even_odd(num):
    # If % 2 is 0, the number is even.
    # Since 0 is falsey, we have to invert it with not.
    return not num % 2

start = 5

while start:
    num = random.randint(1, 99)
    if even_odd(num):
        print("{} is even".format(num))
    else:
        print("{} is odd".format(num))

    start -= 1
Didier Borel
Didier Borel
2,837 Points
Didier Borel
Didier Borel
2,837 Points

Alex, thanks, I stiill have 2 questions where do python get the even_odd ? we never defined it. how did it know how to run the even_odd function? and how can we first define start=5, and then say while start:..... I don't understand the logic of saying a variable is equal to something, and then saying, that as lond as a variable is something else, do this, and then do that.

thxs for your help

Alexander Davison
Alexander Davison
65,469 Points

For your first question, the code challenge defined the even_odd function already. That stuff between the import random and start = 5 is the function definition. For your second question, 0 is "Falsey" and all other numbers is "True".

Take a look at this:

# This is the same...
number = 10
while number != 0:
    print("Hello!")
    counter -= 1

# ...as this
number = 10
while number:
    print("Hello!")
    counter -= 1

Hope that helps! :dizzy: