Arithmetic Operators

All arithmetic operators except + require both operands to be numbers.

Operators are not overloaded with the exception of + for string concatenation.

Operator	Description
+	Addition
-	Subtraction
*	Multiplication
/	Division
%	Modulo (remainder)

var sum = 10 + 5       # 15
var diff = 10 - 3      # 7
var product = 4 * 5    # 20
var quotient = 10 / 3  # 3.333...
var remainder = 10 % 3 # 1

String concatenation

The + operator also performs string concatenation. When either operand is a string and the other is a string, number, boolean, or null, the non-string operand is automatically converted to its string representation. Arrays and objects do not auto-convert to strings:

var msg = "Count: " + 42        # "Count: 42"
var label = "active: " + true   # "active: true"

Division and modulo by zero

Division or modulo by zero throws a runtime error. Always validate the divisor:

if divisor != 0 then
    Data.result = value / divisor
end

Unary negation

The - prefix operator negates a numeric value:

var x = 5
var y = -x     # -5