Basic HTML version of Foils prepared March 30 97

Foil 58 Additional Control Flow Constructs III -- Accelerated Tests
(Chapter 9 of the Llama Book)

From PERL4 Tutorial for CPS616 Computational Science for Information Age Course CPS616 -- February 1995. by Geoffrey C. Fox
There are a set of ways of doing simple tests which imply fewer curly braces and other punctuation
expr1 if testexp; # is equivalent to
if (testexp) {
  • expr1;
}
last, redo and next can be followed by such tests e.g.
last DOREALWORK if userendofinitializationhit ;
There are similar abbreviations for unless,while,until
dothisexpression unless conditionholds;
dostandardstuff while normalconditionholds;
dostandardstuff until specialconditionseen; # should be self explanatory

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