NGWS SDK Documentation  

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7.2.1 Operator precedence and associativity

When an expression contains multiple operators, the precedence of the operators control 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. The precedence of an operator is established by the definition of its associated grammar production. For example, an additive-expression consists of a sequence of multiplicative-expressions separated by + or - operators, thus giving the + and - operators lower precedence than the *, /, and % operators.

The following table summarizes all operators in order of precedence from highest to lowest:

Section Category Operators
7.5 Primary (x) x.y f(x) a[x] x++ x-- new

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7.6 Unary + - ! ~ ++x --x (T)x
7.7 Multiplicative * / %
7.7 Additive + -
7.8 Shift << >>
7.9 Relational < > <= >= is
7.9 Equality == !=
7.10 Logical AND &
7.10 Logical XOR ^
7.10 Logical OR |
7.11 Conditional AND &&
7.11 Conditional OR ||
7.12 Conditional ?:
7.13 Assignment = *= /= %= += -= <<= >>= &= ^= |=

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:

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.