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.
The U.S. Institute of Peace
Kit Patrick
Chris Hayes, MSNBC a NBCNews THINK
Kylie Gable
Sofiaan Fraval
Jenna a Kelly
Willow Aster
Eric O'Rourke
Rick Steves
Genjo Marinello
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