Programming and Problem Solving with Visual Basic .NET by Nell Dale, Michael McMillan, Chip Weems, Mark R. Headington

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By Nell Dale, Michael McMillan, Chip Weems, Mark R. Headington

Visible easy is arguably the preferred computing device programming language for software improvement within the usa and world wide this day. visible easy can also be a good language to educate as a "first" machine language due to its easy-to-learn syntax and adaptability. This booklet treats visible simple as a significant programming language and never as simply one other home windows program. One predicament that's usually voiced while discussing the variations among visible easy and C++ is the extent of object-oriented programming supported by way of visible uncomplicated. With the discharge of VB. internet, the language will help the entire significant positive factors of object-oriented programming-encapsulation, inheritance, and polymorphism.

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1: Variable By default, Visual Basic is a strongly typed language. This means that a variable can contain a value only of the type or class specified in its declaration. You can turn off Visual Basic's strong typing, but this is not recommended. Because of the above declaration, the variable myString can contain only a String value. If Visual Basic comes across an instruction that tries to store a value of the wrong type, it will indicate an error by marking the value as a syntax error. Here's the syntax template for a variable declaration: TypeName is the name of a type or class such as String.

14159265 pi or cake, as long was we always call it the same thing. However, it is much easier for somebody to figure out how a program works if the names we choose for elements actually tell something about them. Whenever you have to make up a name for something in a program, try to pick one that is meaningful to a person reading the program. Visual Basic is a case-insensitive language. Uppercase letters are no different from lowercase letters. The identifiers PRINTTOPPORTION pRiNtToPpOrTiOn printTopPortion PrintTopPortion are treated as the same names and are completely interchangeable.

Syntax The formal rules governing how valid instructions are written in a programming language Metalanguage A language that is used to describe the syntax rules for another language Learning to read a metalanguage is like learning to read the rules of a sport. Once you understand the notation, you can read the rule book. It's true that many people learn a sport simply by watching others play, but what they learn is usually just enough to allow them to take part in casual games. You could learn Visual Basic by following the examples in this book, but a serious programmer, like a serious athlete, must take the time to read and understand the rules.

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