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Illustrate parameters via loops.

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HorseMD 2014-11-14 00:14:38 +00:00
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@ -108,12 +108,12 @@ myloop
\ We can get the value of the index as we loop with `i`:
: one-to-12 ( -- ) 12 0 do i . loop ; \ ok
one-to-12 \ 0 1 2 3 4 5 6 7 8 9 10 11 12 ok
: squares ( -- ) 10 0 do i dup * . loop ; \ ok
squares \ 0 1 4 9 16 25 36 49 64 81 ok
: squares ( -- ) 0 do i dup * . loop ; \ ok
10 squares \ 0 1 4 9 16 25 36 49 64 81 ok
\ Change the "step" with `+loop`:
: threes ( -- ) 15 0 do i . 3 +loop ; \ ok
threes \ 0 3 6 9 12 ok
: threes ( -- ) do i . 3 +loop ; \ ok
15 0 threes \ 0 3 6 9 12 ok
\ Finally, while loops with `begin` <stuff to do> <flag> `unil`:
: death ( -- ) begin ." Are we there yet?" 0 until ; \ ok