Compound Assignment Operators

C# provides several compound assignment operators for abbreviating assignment expressions. Any statement of the form

variable = variable operator expression;

where operator is one of the binary operators +, -, *, / or % (or others we discuss later in the text) can be written in the form

variable operator= expression;

For example, you can abbreviate the statement

c = c + 3;

with the addition compound assignment operator, +=, as

c += 3;

The += operator adds the value of the expression on the right of the operator to the value of the variable on the left of the operator and stores the result in the variable on the left of the operator. Thus, the assignment expression c += 3 adds 3 to c. Figure 5.14 shows the arithmetic compound assignment operators, sample expressions using the operators and explanations of what the operators do.

Figure 5.14. Arithmetic compound assignment operators.

Assignment operator

Sample expression



Assume: int c = 3, d = 5, e = 4, f = 6, g = 12;


c += 7

c = c + 7

10 to c


d -= 4

d = d - 4

1 to d


e *= 5

e = e * 5

20 to e


f /= 3

f = f / 3

2 to f


g %= 9

g = g % 9

3 to g

Increment and Decrement Operators



    Introduction to Computers, the Internet and Visual C#

    Introduction to the Visual C# 2005 Express Edition IDE

    Introduction to C# Applications

    Introduction to Classes and Objects

    Control Statements: Part 1

    Control Statements: Part 2

    Methods: A Deeper Look


    Classes and Objects: A Deeper Look

    Object-Oriented Programming: Inheritance

    Polymorphism, Interfaces & Operator Overloading

    Exception Handling

    Graphical User Interface Concepts: Part 1

    Graphical User Interface Concepts: Part 2


    Strings, Characters and Regular Expressions

    Graphics and Multimedia

    Files and Streams

    Extensible Markup Language (XML)

    Database, SQL and ADO.NET

    ASP.NET 2.0, Web Forms and Web Controls

    Web Services

    Networking: Streams-Based Sockets and Datagrams

    Searching and Sorting

    Data Structures



    Appendix A. Operator Precedence Chart

    Appendix B. Number Systems

    Appendix C. Using the Visual Studio 2005 Debugger

    Appendix D. ASCII Character Set

    Appendix E. Unicode®

    Appendix F. Introduction to XHTML: Part 1

    Appendix G. Introduction to XHTML: Part 2

    Appendix H. HTML/XHTML Special Characters

    Appendix I. HTML/XHTML Colors

    Appendix J. ATM Case Study Code

    Appendix K. UML 2: Additional Diagram Types

    Appendix L. Simple Types


    Visual C# How to Program
    Visual C# 2005 How to Program (2nd Edition)
    ISBN: 0131525239
    EAN: 2147483647
    Year: 2004
    Pages: 600 © 2008-2020.
    If you may any questions please contact us: