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STRUCTURED DESIGN

Part 1: An Introduction to Structured Techniques
by George Martin

Start ý Sequence ý Selection ý Iteration/Looping ý Testing ý Nassi-Schneiderman Charts ý Sources and PDF

SELECTION

In order to understand the selection structure (see Figure 3), you need to know what a condition is. Think of it as a test. For example, is A less than 10? Or, is the A/D converter complete? Those are conditions.

Figure 3ýWhether the condition is true or false determines how the selection structure for the process will appear.

If the condition is true, you execute process E. If the condition is false, you execute D. Note that both D and E do not need to be present, either can be missing. If both are missing, then the test is not necessary.

Again, this structure has only one entry and exit and is still completely testable.

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