Arithmetic Operators
The fundamental operators in C# are much the same as they are in most other modern languages. Table 2-3 lists the fundamental operators in C#
+ Addition
- Subtraction, unary minus
* Multiplication
/ Division
% modulo (remainder after integer division)
The bitwise and logical operators are derived from C rather. Bitwise operators operate on individual bits of two words, producing a result based on an AND, OR or NOT operation.
These are distinct from the Boolean operators; because they operate on a logical condition which evaluates to true or false.
& bitwise And
| Bitwise Or
^ Bitwise exclusive Or
~ One's complement
>> n right shift n places
<< n left shift n places
Increment and Decrement Operators
Like Java and C/C++ , C# allows you to express incrementing and decrementing of integer variables using the ++and -- operators. You can apply these to the variable before or after you use it:
i = 5;
j = 10;
x = i++; //x = 5, then i = 6
y = --j; //y = 9 and j = 9
z = ++i; //z = 7 and i = 7
Combining Arithmetic and Assignment Statements
C# allows you to combine addition, subtraction, multiplication, and division with the assignment of the result to a new variable:
x = x + 3; //can also be written as:
x += 3; //add 3 to x; store result in x
//also with the other basic operations:
temp *= 1.80; //mult temp by 1.80
z -= 7; //subtract 7 from z
y /= 1.3; //divide y by 1.3
This is used primarily to save typing; it is unlikely to generate any different code. Of course, these compound operators (as well as the ++and – operators) cannot have spaces between them.