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Constants: Variables That Never ChangeData TypesIntegerFloatStringsBooleans. 3.4 Basic Arithmetic Operators. 3.5 Input and Output. O'Reilly Media

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Computer science relies on organizing data so it can be searched or sorted efficiently. : Ordered lists of items, like a shopping list. Computer Science Programming Basics in Ruby_ Ex...

These determine the "flow" of a program, deciding which parts of the code run and when. Computer Science Programming Basics in Ruby_ Ex...