February 2, 2004	Intro to Ruby	Slide #14
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Control Structures (continued)

case statement

"multiway if on steroids"

     color = case fruit
         when "cherry" then "red"

         when "lime" then "green"

         when "banana", "lemon"
             "yellow"

         else
             puts "unknown fruit"
             exit
     end

statement modifiers

with if, while, until

     puts "red" if fruit == "cherry"
     puts "I like pie" while 1

but not with for

     puts "I like #{fruit} pie" for fruit in %w(apple peach rhubarb) # DOESN'T WORK

break/next/redo/retry

break -- terminate loop
next -- restart loop with next entry
redo -- restart loop with current entry
retry -- restart loop from first entry

Copyright © 2004 Walter C. Mankowski