Essential C# 2.0

Chapter 3. Operators and Control Flow In This Chapter, you will learn about operators and control flow statements. Operators provide syntax for performing different calculations or actions appropriate for the operands within the calculation....

Operators Now that you have been introduced to the predefined data types (refer to Chapter 2), you can begin to learn more about how to use these data types in combination with operators in order to perform calculations. For example, you can make ...

Introducing Flow Control Toward the end of this chapter is a code listing (Listing 3.42) that shows a simple way to view a number in its binary form. Even such a simple program, however, cannot be written without using control flow statements. Suc...

Code Blocks ({}) In the previous if statement examples, only one statement follows if and else, a single System.Console.WriteLine(), similar to Listing 3.23. Listing 3.23. if Statement with No Code Block if(input<9) System.Console...

Scope Scope is the hierarchical context bound by a code block or language construct. C# prevents two declarations with the same name declared in the same scope. For example, it is not possible to define two local variables in the same code block w...

Boolean Expressions The portion of the if statement within parentheses is the Boolean expression, sometimes referred to as a conditional. In Listing 3.28, the Boolean expression is highlighted. Listing 3.28. Boolean Expression if(input &...

Bitwise Operators (<<, >>, |, &, ^, ~) An additional set of operators that is common to virtually all programming languages is the set of operators for manipulating values in their binary formats: the bit operators. Beginn...

Control Flow Statements, Continued With the additional coverage of Boolean expressions, it's time to consider more of the control flow statements supported by C#. As indicated in the introduction, many of these statements will be familiar to exper...

Jump Statements It is possible to alter the execution path of a loop. In fact, with jump statements, it is possible to escape out of the loop or to skip the remaining portion of an iteration and begin with the next iteration, even when the conditi...

C# Preprocessor Directives Control flow statements evaluate conditional expressions at runtime. In contrast, the C# preprocessor is invoked during compilation. The preprocessor commands are directives to the C# compilers specifying the sections of...

Summary This chapter began with an introduction to the C# operators related to assignment and arithmetic. Next, you used the operators along with the const keyword to declare constant expressions. Coverage of all of the C# operators was not sequen...