Ranges

• Stored using the Range class
• Ranges are used to internally to implement sequences, conditions, and intervals

myRange.min
myRange.max

myRange.include?(expr)              # returns true if expr is in the range; otherwise, returns false
myRange.reject {|x| reject-expr }   # returns the range minus any elements satisfied by reject-expr

myRange.length

Sequences

expr..expr     inclusive range
expr...expr    range excluding the last element

Intervals

case expr
  when <interval>   # If expr is in the interval
    ....
end