Basic HTML version of Foils prepared March 30 97

Foil 56 Additional Control Flow Constructs I (Chapter 9 of the Llama Book)

From PERL4 Tutorial for CPS616 Computational Science for Information Age Course CPS616 -- February 1995. by Geoffrey C. Fox
1 last, next and redo allow one simple ways to alter execution flow in loops
2 while (something is tested) {
  • # redo goes to here
  • somecalc1;
  • if (somecondition) {
    • somecalc2;
  • }
  • somecalc3;
  • #next goes to here
3 }
4 # last jumps to here
5 These commands control innermost enclosing for foreach or while loop
6 last jumps out of loop
7 next jumps over rest of loop
8 redo jumps back to start of loop
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