By C. A. Hofeditz

Desktop Programming Languages in perform presents an summary of varied computing device programming languages. The publication starts with the basics: what courses are; how they're deliberate and arranged; what components of the pc the programmer controls; flowcharting; and the way desktop information is geared up. It then discusses fabric universal to all languages, together with the access software, the compiler, the run-time method, syntax diagrams, and coding varieties. the biggest element of this booklet is dedicated to 2 extremely popular languages—BASIC and COBOL. It presents a quick historical past of the language's improvement and use; an outline of the way the programming procedure is equipped; its significant parts, divisions of directions, and an outline of its guideline set (instruction-by-instruction); how a application is written, together with a pattern application; and a self-test, together with workouts within which programming statements has to be written. the ultimate bankruptcy discusses these languages which the reader is much less more likely to use yet should still find out about. integrated are descriptions of FORTRAN and RPG II.

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Components of a Programming Language 43 After the procedure is completed, the overall program continues from the point at which it called the procedure into action. CONTROL STRUCTURES AND STRUCTURED PROGRAMMING Structured programming is a term you may hear occasionally. What is structured programming, and how does it differ from unstructured programming? These are two questions we'll answer in this section. It's important to do this now because some languages we'll discuss later are much better suited to structured programming than others.

The program to do this needs some way of acquiring student name without knowing it in advance. The student name is thus a variable that must be identified somehow. This variable is a character variable, which is commonly called a 'string variable' in that it is made up of a string of characters. The name given to the variable is thus a string variable name. It would certainly be helpful if the string variable in our example could be called STUDENT-NAME, but again the languages have a wide range of sizes available to construct names.

What is structured programming, and how does it differ from unstructured programming? These are two questions we'll answer in this section. It's important to do this now because some languages we'll discuss later are much better suited to structured programming than others. If you have a good understanding of what structured programming is, you'll be able to recognize language features that aid in the preparation of structured programs. Let's use an analogy to illustrate the difference between structured and unstructured programs.

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