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The pseudo-operators ++/--/p=
The ++ and -- operators are used to increase or decrease the value of a
variable by 1.
x = 4
x ++ : REM x <- x + 1 = 5
x -- : REM x <- x - 1 = 4
The generic p= operators are used as in C
Where p any character of -+/\*^%&|
x += 4 : REM x <- x + 4
x *= 4 : REM x <- x * 4
All these pseudo-operators are not allowed inside of expressions
y = x ++ ' ERROR
z = (y+=4)+5 ' ALSO ERROR
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