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Decision Constructs and the Relational/Equality

Operators

Now that you can iterate over a block of statements, the next related concept is how to control the

flow of program execution. C# defines two simple constructs to alter the flow of your program,

based on various contingencies:

• The if/else statement

• The switch statement

The if/else Statement

First up is our good friend the if/else statement. Unlike in C and C++, however, the if/else state-

ment in C# operates only on Boolean expressions, not ad hoc values such as –1, 0. Given this,

if/else statements typically involve the use of the C# operators shown in Table 3-7 in order to

obtain a literal Boolean value.

Table 3-7.

C# Relational and Equality Operators