Ruby Case Expression

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The ruby case statement is similar to the C/C++/Java switch, but more directly related to the similar (and superior) structures from Pascal and Ada. First, it assumes that each case ends where the next one starts, without needing a break to terminate a case. Secondly, each case can be expressed rather generally, with a single value, a range of value, or a list containing some of each.

For this example, I’m using the fact the control statements have a return value. That’s not special to cases, and their value can be used or not, just as ifs.