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

Posted by dylan hamm
dylan hamm
3,667 Points

I don't know what I did wrong but I keep getting the error "wrong number of prints"

I keep getting the same error. i have no idea what i did wrong

even.py 
import random
start = 5
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
while start == True:
    random_number = random.randint(1.99)
    number = even_odd(random_number)
    if number == 0:
        print("{} is even").format(random_number)
    else:
        print("{} is odd").format(random_number)
    start - 1

1 Answer

Umesh Ravji
Umesh Ravji
42,386 Points
Umesh Ravji
Umesh Ravji
42,386 Points

Hi Dylan, you have a few minor issues in your code.

1. While Condition

The variable start is a number, so it doesn't really make sense to check to see if it is equal to True otherwise the while loop will never run. Probably best to have the condition being start > 0, but there are other ways.

while start > 0:

2. Generating Random Integer

Probably just a typo, but you need a comma between the two numbers, not a dot.

random_number = random.randint(1, 99)

3. Odd or Even Test Condition

The even_odd method returns True (if the number is even) or False (if the number is odd). You are storing this Boolean value in a variable called number, which can be a little misleading (maybe you want to rename it). Since A Boolean is either True or False the conditional check can be shortened (and comparing it to 0 doesn't make much sense).

if number:
    print...
else:
    print...

4. Correct Brackets Around Print Statements

The format method is on the string, not the print function, so make sure to call it appropriately.

print("{} is even".format(random_number))

5. Decrementing Start

Simply subtracting 1 from start will not change the value of start. You have to reassign the decreased value to start.

start = start - 1
# or shorthand
start -= 1

Putting everything together

start = 5
while start > 0:
    random_number = random.randint(1, 99)
    number = even_odd(random_number)
    if number:
        print("{} is even".format(random_number))
    else:
        print("{} is odd".format(random_number))
    start -= 1