Pinnacle Speakers FXDEKO User Manual

157

In the previous topic, you saw that variable assignment is indicated by the equal
sign (=), which is just one of many symbols, known as operators, that represent
operations performed on data.

The FXDeko Macro Programming Language uses a subset of the operators
available in C, as well as a few additions specific to FXDeko.

Arithmetic operators perform mathematical operations within expressions:

+

$a + $b

adds $a and $b

-

$a - $b

subtracts $b from $a

*

$a * $b

multiplies $a by $b

/

$a / $b

divides $a by $b

%

$a % $b

calculates remainder of $a/$b

-

-$a

negates the value of $a

You can perform arithmetic operations on one-character strings by adding or
subtracting integer values to the character. For example, the expression "A"+1
has the value "B".

Using single quotation marks in an expression yields the numerical value of the
character key. For example, ’A’+1 has the value 66.

Comparison operators compare values and determine whether an expression is
true or false. An expression is any combination of variables, commands and
operators that results in a single value.

An expression is true if its value is non-zero; it is false if its value is 0.

==

$a == $b

True if $a equals $b

>

$a > $b

True if $a is greater than $b

>=

$a >= $b

True if $a is greater than or equal to $b

<

$a < $b

True if $a is less than $b

<=

$a <= $b

True if $a is less than or equal to $b

!=

$a != $b

True if $a does not equal $b

!

!$a

True if $a is false (equals 0)

&&

$a && $b

True if both $a and $b are true

||

$a || $b

True if either $a or $b is true

There is one string operator, for concatenation of strings:

%%

$a %% $b

joins string $b to the end of string $a

Strings can be compared for equality and inequality using the comparison
operators == and !=.