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GNU Smalltalk User's Guide

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4.7.2 Intervals

It is also possible to represent a range of numbers as a standalone object. This allows you to represent a range of numbers as a single object, which can be passed around the system.
 
   Smalltalk at: #i put: (Interval from: 5 to: 10) !
   i printNl !
   i do: [:x | x printNl] !

As with the integer loops, the Interval class can also represent steps greater than 1. It is done much like it was for our numeric loop above:
 
   i := (Interval from: 5 to: 10 by: 2)
   i printNl !
   i do: [:x| x printNl] !


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