Covering some basic topics I haven't seen elsewhere on Cody.
Return the number of punctuation characters in the input variable.
Trouble in the test suite :)
I think the problem is with Cody itself today. It's doing weird things. If you submit this solution again it fails.
First N Perfect Squares
First non-zero element in each column
Solving Quadratic Equations (Version 1)
Deleting an element in a matrix
Back to basics 13 - Input variables
Back to basics 20 - singleton dimensions
Back to basics 26 - Keywords
Valid Chess Moves
Back to basics 18 - justification
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