A Guide to Working With Visual Logic by Thad Crews

By Thad Crews

A advisor TO operating WITH visible good judgment is helping you and your scholars maximize the visible common sense software program. The ebook in actual fact introduces visible common sense as an easy, yet robust, device for getting to know programming common sense and layout with out conventional high-level programming language syntax. visible common sense makes use of flowcharts to give an explanation for crucial programming ideas, together with variables, enter, project, output, stipulations, loops, strategies, images, arrays, and documents.

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May not be copied, scanned, or duplicated, in whole or in part. WHILE LOOPS CONSOLE INPUT/OUTPUT SUMMARY » Console I/O is persistent, meaning each line of input and output remains in the console window for the lifetime of the program. » In Visual Logic, console input and output options are under the “More >>” button in the » edit dialog, and console I/O is indicated by the presence of the console screen icon at the top of the flowchart element. The end-of-output (§) symbol always appears at the end of the console output expression.

For example, consider again the long-distance billing algorithm previously shown in Figure 2-4. This can be rewritten using a single compound condition, as shown in Figure 2-5. Both solutions are right because they both produce the correct result. , more clear) solution. 26 Copyright 2009 Cengage Learning, Inc. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part. 10 End Figure 2-5 Compound condition solution to determine long-distance billing rate ASK THE AUTHOR Q: Are you saying there is no difference between the nested IF solution (Figure 2-4) and the compound condition solution (Figure 2-5) to the long-distance billing problem?

All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part. C H A P T E R T W O CHAPTER SUMMARY » A condition is an expression that evaluates to either true or false. Conditions typically use one of six relational operators: ϭ, Ͼ, Ͻ, Ͼϭ, Ͻϭ, ϽϾ. » IF statements use conditions to choose between actions. When executed, the condition is » » evaluated. If the condition is true, control flows to the true branch. If the condition is false, control flows to the false branch. The true and false branches of an IF statement may contain any valid statement, including other IF statements.

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