8.5 Expressions

8.5 Expressions

C# includes unary operators, binary operators, and one ternary operator.

The following table summarizes the

operators, listing them in order of precedence from highest to lowest:

Section Category Operators

14.5 Primary x.y f(x) a[x] x++ x-- new

typeof checked unchecked

14.6 Unary + - ! ~ ++x --x (T)x

14.7 Multiplicative * / %

14.7 Additive + -

14.8 Shift << >>

14.9 Relational and

type-testing

< > <= >= is as

14.9 Equality == !=

14.10 Logical AND &

14.10 Logical XOR ^

14.10 Logical OR |

14.11 Conditional AND &&

14.11 Conditional OR ||

14.12 Conditional ?:

14.13 Assignment = *= /= %= += -= <<= >>= &= ^= |=

When an expression contains multiple operators, the precedence of the

operators controls the order in which

the individual operators are evaluated. For example, the expression x + y *

z is evaluated as

x + (y * z) because the * operator has higher precedence than the +

operator.

When an operand occurs between two operators with the same precedence, the

associativity of the operators

controls the order in which the operations are performed:

?Except for the assignment operators, all binary operators are

left-associative, meaning that operations

are performed from left to right. For example, x + y + z is evaluated as (x

+ y) + z.

?The assignment operators and the conditional operator (?:) are

right-associative, meaning that

operations are performed from right to left. For example, x = y = z is

evaluated as x = (y = z).

Precedence and associativity can be controlled using parentheses. For

example, x + y * z first multiplies

y by z and then adds the result to x, but (x + y) * z first adds x and y

and then multiplies the result by z.