Dijkstra's rules of structured programming
- Structured programming imposes discipline on direct transfer of control.
- every function, every block within a function, should have one entry and one exit.
- therefore there should be only one return statement in a function, no break or continue statements in a loop, and never, ever, any goto statements
- Dijkstra showed that the use of unrestrained jumps (goto statements) is harmful to program structure.
- he replaced those jumps with the more familiar if/then/else and do/while/until constructs.
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