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GNU Smalltalk User's Guide

4.7.1 Integer loops

Integer loops are constructed by telling a number to drive the loop. Try this example to count from 1 to 20:

1 to: 20 do: [:x | x printNl ] !

There's also a way to count up by more than one:

1 to: 20 by: 2 do: [:x | x printNl ] !

Finally, counting down is done with a negative step:

20 to: 1 by: -1 do: [:x | x printNl ] !