By John Sharp
This ebook does, certainly, take you thru C# step-by-step. It does a farly solid activity of introducing ideas and displaying them in motion. often via establishing a dossier and coming into the code. My greatest criticism approximately this booklet and nearly all of different programming books that i have encountered is the inability of workouts. it is all good and reliable to illustrate it slow assertion and the knowledge forms yet simply announcing, "Type within the following lines", does not train you to jot down a application.
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Additional resources for Microsoft Visual C# .NET Step by Step--Version 2003 (Step By Step (Microsoft))
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The variable type int is an example of a keyword. It is the name of one of the primitive C# types—integer. (An integer is a whole number. ) After you’ve declared your variable, you can assign it a value. The following statement assigns age the value 42. Again, you’ll see that the semicolon is required. age = 42; 32 Chapter 2: Working with Variables, Operators, and Expressions Chapter 2: Working with Variables, Operators, and Expressions 33 The equal sign (=) is the assignment operator, which assigns the value at its right to the variable at its left.
You must give each variable in a program a unique name. You use a variable’s name to refer to the value it holds. NET Framework documentation makes several recommendations about variable naming: • Don’t use underscores. • Don’t create identifiers that differ only by case. For example, do not create one variable named myVariable and another named MyVariable for use at the same time. • Start the name with a lowercase letter. • In a multiword identifier, start the second and each subsequent word with an uppercase letter.
Some other languages (notably C and C++) allow you to write an integer expression and silently convert the integer value to true (nonzero) or false (zero). C# never does this silent conversion. Also, if you’re writing an if statement and you accidentally write an assignment instead of an equality test, the C# compiler will recognize your mistake, for example: int seconds; ⋮ if (seconds = 59) // compile-time error ⋮ if (seconds == 59) // ok Finally, you can use a Boolean variable as the expression, as in this example: bool inWord; ⋮ if (inWord == true) // ok, but non-idiomatic ⋮ if (inWord) // better Using Blocks to Group Statements Sometimes you’ll want to run two or more statements when a Boolean expression is true.