Arithmetic operators (+, -, *, ...)

Arithmetic operators create properties whose value is the result of an arithmetic operation. The arguments of these operators must be properties whose values are instances of number classes . The platform currently supports the following arithmetic operators:

Operator	Name	Description	Example	Result
+	Summation	Takes two input operands and returns their sum	3 + 5	8
-	Difference	Accepts two input operands and returns their difference This operator also has a unary form, in which case the first operand is considered equal to 0	5 - 3	2
*	Multiplication	Accepts two input operands and returns their product	3 * 5	15
/	Ratio	Takes two input operands and returns their ratio	15 / 3	5

All of these operators return NULL if one of the operands is NULL . It is also possible to use a special form of summation and difference operators with brackets, in which case NULL will be equivalent to 0. The reverse is also true for these type of operators: if the result of an operator in such form is 0, then NULL is returned (e. g., 5 (-) 5 = NULL):

Operator	Name	Description	Example	Result
(+)	Summation	Takes two input operands and returns their sum, treating NULL as 0	3 (+) 5 3 (+) NULL	8 3
(-)	Difference	Takes two input operands and returns their difference, treating NULL as 0	5 (-) 3 5 (-) NULL 5 (-) 5	2 5 NULL

Determining the result class

The result class is determined as:

Operator	Result
+, -	Common ancestor ("Numbers" family)
*	NUMERIC[p1.IntegerPart + p1.Precision + p2.IntegerPart + p2.Precision, p1.Precision + p2.Precision]
/	NUMERIC[p1.IntegerPart + p1.Precision + p2.IntegerPart + p2.Precision, p1.Precision + p2.IntegerPart]

Language

Description of arithmetic operators.

Examples

sum(a, b) = a + b;
transform(a, b, c) = -a * (b (+) c);