The following operators are available:
=
  assigns a value to a variable.
  example:  var=5;

+
  adds two values, returns the sum.
  example:  var=5+var2;

-
  subtracts two values, returns the difference.
  example:  var=5-var2;

*
  multiplies two values, returns the product.
  example:  var=5*var2;

/
  divides two values, returns the quotient.
  example:  var=5/var2;

%
  converts two values to integer, performs division, returns remainder
  example:  var=var2%5;

|
  converts two values to integer, returns bitwise OR of both values
  example:  var=var2|31;

&
  converts two values to integer, returns bitwise AND of both values
  example:  var=var2&31;