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

Posted by Shavaune Shackleford
Shavaune Shackleford
9,161 Points

"If that random number is even (use even_odd to find out)" how do I check if that number is even?

"If that random number is even (use even_odd to find out)"

This challenge is asking me to use a predefined function to check if the random int is even or not using an if statement. Right now I currently wrote "If even_odd(random_num)" and I don't know where to go from there because I don't know what to compare it to? The main problem is that predefined function. It only returns "not num % 2" which i don't know exactly what that means and where to go using that.

even.py 
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 = True:
    random_num = random.int(1, 99)
    if even_odd(random_num)

3 Answers

Miles Aylward
Miles Aylward
13,225 Points
Miles Aylward
Miles Aylward
13,225 Points

When you use that operator, '%', it return the remainder or two divided numbers so if I divided 6%2 i would get back 0 because there is no remainder but 7%2 would give me 1. the reason it returns not is because 0 is considered false. And all other numbers are true. Meaning 6%2 would return false but in reality we need the opposite so by returning NOT NUM % 2 all even numbers will return true and odd numbers, those with remainders, will return false.

Shavaune Shackleford
Shavaune Shackleford
9,161 Points
Shavaune Shackleford
Shavaune Shackleford
9,161 Points

solved using:

import random

start = 5 def even_odd(num): if num % 2 == 0: return True else: return False

while start > 0: random_num = random.randint(1, 99)

if even_odd(random_num) == True:
    print("{} is even".format(random_num))
else:
    print("{} is odd".format(random_num))
start -= 1

...... Felt like doing it this way was a bail out. I'm looking back to see if I can solve it using the original even_odd function they provided.

Daniel Schmidt
Daniel Schmidt
9,780 Points
Daniel Schmidt
Daniel Schmidt
9,780 Points

Try this:

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