Pinnacle Speakers DEKO500 User Manual

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The assignment operator assigns a value to a variable, and may simultaneously
perform other operations:

=

$a = $b

assigns the value of $b to $a

+=

$a += 1

adds 1 to $a, assigns total to $a

-=

$a -= 5

subtracts 5 from $a, assigns total to $a

*=

$a *= 2

multiplies $a by 2, assigns product to $a

/=

$a /= 2

divides $a by 2, assigns quotient to $a

%=

$a %= 3

divides $a by 3, assigns remainder to $a

>>=

$a >>= 4

shifts $a right 4 bits

<<=

$a <<= 4

shifts $a left 4 bits

%%=

$a %%= "ok"

concatenates “ok” to $a, assigns string to $a

&=

$a &= 2

bitwise AND $a and 2, assigns result to $a

|=

$a |= 2

bitwise OR $a and 2, assigns result to $a

^=

$a ^= $b

bitwise exclusive OR $a and $b, assigns result to

$a

Deko500 uses the same order of operator precedence used by C:

[]

subscript, element

()

parentheses

! ~ -

logical not, one’s complement, unary minus

* / %

multiply, divide, modulo

+ -

plus, minus

<< >>

left shift, right shift

%%

concatenate strings

< <=

> >=

comparisons

== !=

equality, inequality

&

bitwise AND

^

bitwise exclusive OR

|

bitwise OR

&&

logical AND

||

logical OR

= += -= etc.

assignments

Use nested parentheses to avoid ambiguity in expressions. For example:

$inc = ( ($i+1) * ($j+1) ) / 100