FAQ: Lambda Function Code Challenge - Even/Odd

This community-built FAQ covers the “Even/Odd” exercise from the lesson “Lambda Function Code Challenge”.

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This exercise can be found in the following Codecademy content:
Data Science

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my solution:
even_or_odd = lambda num: “odd” if num%2 > 0 else “even”

I originally was trying to define “even” first but kept getting errors because I was defining “even” by num%2 = 0. The system did not like the equal sign within the function.

From there, I was able to find this solution as well:
even_or_odd = lambda num: “even” if num%2 < 1 else “odd”

I did the same thing. Try using ‘==’ instead of ‘=’ in the lambda function. The below solution worked for me:

even_or_odd = lambda num: “even” if num%2 == 0 else “odd”

My first go was: even_or_odd = lambda num: “even” if num%2 = 0 else “odd”. This was unsuccessful because of the single ‘=’. A double ‘==’ works. Why is this?

“=” is used to assign a value to a variable. “==” is used instead for comparison

Hello Codecademy Forum,

#Write your lambda function here
even_or_odd = lambda foo: “even” if foo % 2 == 0 else “odd”
print even_or_odd(10)
print even_or_odd(5)

Why do we not need to use parenthesis here to print out the lambda functions? Is this because this course was designed using an older version of Python?


Yes print was a statement rather than a function in earlier versions of Python. Once it was set up as a function (3.x) it was made available to older Python2 versions with from __future__ import print_function.

Generally that import removes the option to use print as a statement but most codecademy lessons, even those that execute a script with Python2.x seem to accept print as both a function and a statement.

hello lovely people!
can someone help me identify why this is wrong? or point, if relevant what should be removed/changed/added?
thank you!!!

even_or_odd = lambda num: “even” if num%2 else “odd”


If the input is odd, return "odd"

What is the outcome of num % 2? Using logic like this is a test of truthiness of the object, so you’re effectively doing the same as bool(num % 2).

Once you’re sure about the output of num % 2 for various values you should check what happens when you do your truth_value_testing