prefix

#prefix

##Syntax A prefixOperator is one of:

(a) + % Integer and real identity % (does not change value) (b) % Integer and real negation (c) not % Not (Boolean negation) (d) # % Type cheat (e) ^ % Pointer following

##Description A prefix operator is placed before a value or operand to produce another value. For example, if the value of x is seven, then -x is negative seven. There are also infix operators such as multiplication (*) and addition (+), which are placed between two values to produce a third value. See infix operator.

The + and prefix operators can be applied only to numeric values (integer, real and natural numbers). The not prefix can be applied only to true/false (boolean) values. For example not (x > y) is equivalent to x <= y. The not operator produces true from false and false from true.

The # operators is a type cheat (see cheat), and the ^ operator is pointer following (see pointer).

See also int, real and boolean types, as well as precedence (for the order of applying operators) and infix operators.