We continue to look at how to construct loops including how to do something special the first time through the loop. We introduce the idea of 'None' which is a way to indicate that a variable is currently empty.
Ben Pakulski
Unladylike Media
Tom Whitty and Ben Russell
KPMG LLP (U.S.)
Ani Rider a HK Goldstein
Medscape Professional Network
Aditya singh
Jacob Thomas
Ela green
HARISH
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