Variables
“All of the books in the world contain no more information than is broadcast as video in a single large American city in a single year. Not all bits have equal value.”
—Carl Sagan
“Believing oneself to be perfect is often the sign of a delusional mind.”
—Lieutenant Commander Data
In this chapter:
- Variables: What are they?
- Declaring and initializing variables.
- Common uses for variables.
- Variables you get “for free” in Processing (AKA “built-in” variables).
- Using random values for variables.
4.1 What is a variable?
I admit it. When I teach programming, I launch into a diatribe of analogies in an attempt to explain the concept of a variable in an intuitive manner. On any given day, I might say “A variable is like ...
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