C# 0 The Complete Reference

Math.Sqrt( )

 to 

int

 results in the whole number component 

of the value. In this expression

Math.Sqrt(n) - (int) Math.Sqrt(n)

the cast to 

int

 obtains the whole number component, which is then subtracted from the 

complete value, yielding the fractional component. Thus, the outcome of the expression 

is

double

. Only the value of the second call to 

Math.Sqrt( )

 is cast to 

int

.

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4

Operators

C

# provides an extensive set of operators that give the programmer detailed control 

over the construction and evaluation of expressions. Most of C#’s operators fall into 

the following categories: 

arithmetic, bitwise, relational,

 and 

logical.

 These operators are 

examined in this chapter. Also discussed are the assignment operator and the 

?

 operator. C# 

also defines several other operators that handle specialized situations, such as array indexing, 

member access, and the lambda operator. These special operators are examined later in this 

book, when the features to which they apply are described.