addition - two to 32 arguments
multiplication - two to 32 arguments
increment variable by one
decrement variable by one
logical and - two to 32 arguments
logical or - two to 32 arguments
equality (not strings)
less than or equal
greater than or equal
Add, sub, mul and div do integer arithmetic. Functions add and mul can have two to 32 arguments; the sum or product of the full set of arguments is computed. Functions sub and div have two arguments each; sub subtracts its second argument from its first, and div divides its first argument by its second. The mod function returns the remainder after dividing the first parameter by the second. If the second argument to div or mod is zero, these functions return 0 and generate a run time error. Exp performs integer exponentiation. Neg negates its argument.
Incr and decr increment by one and decrement by one, respectively, the value of a variable. The argument to both functions must be a variable.
And and or do logical operations. Both functions take two to 32 arguments. All arguments are and'ed or or'ed together, respectively. The arguments are evaluated from left to right, but only up to the point where the final value of the function becomes known. Not does the logical not operation.
Eq, ne, lt, le, gt and ge evaluate the six ordering relationships between two integers.