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# Chapter 5Operators

What’s in This Chapter

• Arithmetic, concatenation, comparison, logical, and bitwise operators
• Operator precedence
• DateTime and TimeSpan operators
• Type conversion operators

Please note that all the code examples for this chapter are available as a part of this chapter’s code download on the book’s website at www.wrox.com/go/csharp5programmersref on the Download Code tab.

An operator is a basic code element that performs some operation on one or more values to create a result. The values the operator acts upon are operands. For example, in the following statement, the operator is + (addition), the operands are B and C, and the result is assigned to the variable A.

A = B + C

C# operators fall into five categories: arithmetic, concatenation, comparison, logical, and bitwise. This chapter first explains these categories and the operators they contain; it then discusses other operator issues such as precedence, assignment operators, and operator overloading.

## Arithmetic Operators

The following table lists the arithmetic operators provided by C#. Most of these should be familiar to you.

 Operator Purpose Example Result ++ Increment x++ or ++x Sets x = x + 1 -- Decrement x-- or --x Sets x = x - 1 – Negation -x Sets x = -x + Unary plus +x Sets x = +x (leaves x unchanged) * Multiplication 2 * 3 6 / Division 3.0 / 2 1.5 % Modulus 17 mod 5 2 + Addition 2 + 3 5 - Subtraction 3 - 2 1 << Bit left shift 10110111 << 1 01101110 >> Bit right ...

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