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Challenge Notebook

Problem: Implement foo(val), which returns val

Constraints
Test Cases
Algorithm
Code
Unit Test
Solution Notebook

Constraints

Does foo do anything else?
- No

Test Cases

foo(val) -> val

Algorithm

Refer to the Solution Notebook. If you are stuck and need a hint, the solution notebook's algorithm discussion might be a good place to start.

Code



In [ ]:

    
def foo(val):
    # TODO: Implement me
    pass

Unit Test

The following unit test is expected to fail until you solve the challenge.



In [ ]:

    
%load test_foo.py

Solution Notebook

Review the Solution Notebook for a discussion on algorithms and code solutions.