Stephens' C# Programming with Visual Studio® 2010 24-Hour Trainer

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LESSON 11 Using Variables and Performing CalCUlations

Assignment Operators

The assignment operators set a variable (or property or whatever) equal to something else. The

simplest of these is the

= operator, which you have seen several times before. This operator simply

assigns whatever value is on the right to the variable on the left.

The other assignment operators, known as compound assignment operators, combine the variable’s

current value with whatever is on the right in some way. For example, the following code adds

3 to

whatever value

x currently holds:

x += 3;

This has the same effect as the following statement that doesn’t use the += operator:

x = x + 3;

Table 11-7 summarizes these operators. For the examples, assume x is a float and a and b are bools.

TABLE 117

OPERATOR MEANING EXAMPLE MEANS

=

Assign

x = 10; x = 10;

+=

Add and assign

x += 10; x = x + 10;

-=

Subtract and assign

x -= 10; x = x - 10;

*=

Multiply and assign

x *= 10; x = x * 10;

/=

Divide and assign

x /= 10; x = x / 10;

%=

Modulus and assign

x %= 10; x = x % 10;

&=

Logical and and assign

a &= b; a = a & b;

|=

Logical or and assign

a |= b; a = a | b;

^=

Logical xor and assign

a ^= b; a = a ^ b;

Bitwise Operators

The bitwise operators allow you to manipulate the individual bits in integer values. For example, the

bitwise

| operator combines the bits in two values so the result has a bit equal to 1 wherever either

of the two operands has ...