Package structured-loops.plt contributed by gfb 
To load: (require (planet gfb/structured-loops:2:0))
Old style:(require (planet "main.rkt" ("gfb" "structured-loops.plt" 2 0)))
Package description:

Looping constructs for natural expression of structured imperative programming.

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 Current version
PLaneT versionExternal versionSourceDLsDocsReq. PLTDate added
(2 0)
18
[none]
[none]2011-08-18
To load: (require (planet gfb/structured-loops:2:0))
Available in repositories: 4.x
  • While and until: added continue and break.
  • Added Scribble'd manual.
  • Changed to main.rkt convention
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 Old versions
PLaneT versionExternal versionSourceDLsDocsReq. PLTDate added
(1 0)0.9
10
[none]
[none]2011-03-20
To load: (require (planet "structured-loops.rkt" ("gfb" "structured-loops.plt" 1 (= 0))))
Available in repositories: 4.x

While and until, extended with optional post-processing based on the sub-condition that caused termination.

Initial release for my use in teaching. Read source for documentation; public documentation to come.