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Language Reference Guide - DOC. 5797G
Relational Operators
All of the above operators, with the exception of the negation (-), NOT, and
complement (!) operators, are called binary operators. Binary operators take two
values, perform an operation, and return a third value as a result. For example, 5 + 6
would return the value of 11. The arguments for a given operator are called its
operands. In the above example, the + sign is the operator and 5 and 6 are the
operands.
The negation, NOT, and complement operators are called unary operators, which
means it takes a single number and performs an operation. In this case, the negation
operator performs a negate, or 2's complement. A 2's complement takes a 16-bit
number, bitwise inverts it, and adds 1. The operand in a negation is the value being
negated. Operands do not have to be simple numbers. They may also be variables or
the results of a function call. For example, in the expression -X, the - sign is the
operator and the variable X is the operand.
OPERATOR NAME EXAMPLE EXPLANATION
= Comparison X = Y True if X is equal to Y, False otherwise.
= Assignment X = Y Assigns the contents in Y to X. The assignment
operator cannot be used within expressions.
! Complement ! X If X = 0, X changes to 1. If X is different from 0,
evaluates to 0.
<> Not Equal To X <> Y X is not equal to Y.
< Unsigned Less Than X < Y X is less than Y (unsigned).
> Unsigned Greater X > Y X is greater than Y (unsigned).
<= Unsigned Less Than or Equal X <= Y X is less or equal to Y (unsigned).
>= Unsigned Greater Than or Equal X >= Y X is greater or equal to Y (unsigned).
S< Signed Less Than X S< Y X is less than Y (signed).
S> Signed Greater Than X S> Y X is greater than Y (signed).
S<= Signed Less Than or Equal X S<= Y X is less or equal to Y (signed).
S>= Signed Greater Than or Equal X S>= Y X is greater or equal to Y (signed).
&& Logical AND X && Y True if X and Y are both non-zero. False
otherwise.
|| Logical OR X || Y True if either X or Y is non-zero. False otherwise.
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