Operators

In the StreamServe scripting language, you can use the operators described in the table below.

-	Subtraction Subtracts the value of one expression from another. $var = expression1 - expression2
+	Addition Adds the value of one numeric expression to another, or concatenates two strings. $var = expression1 + expression2
*	Multiplication Multiplies the value of two expressions. $var = expression1 * expression2
/	Division Divides the value of two expressions. $var = expression1 / expression2
++	Incrementation Increments the value of a variable by one. $var++
--	Decrementation Decrements the value of a variable by one. $var--
-=	Subtraction Assignment Subtracts the value of an expression from the value of a variable, and assigns the result to the variable. $var -= expression Equivalent to $var = $var - expression. Works only with numeric values.
+=	Addition Assignment Adds the value of an expression to the value of a variable, and assigns the result to the variable. $var += expression Equivalent to $var = $var + expression. Works only with numeric values.
=	Assignment Assigns a value to a variable. $var = expression
==	Equality Returns a Boolean value indicating the result of the comparison. expression1 == expression2
!=	Inequality Returns a Boolean value indicating the result of the comparison. expression1 != expression2
>	Greater than Returns a Boolean value indicating the result of the comparison. expression1 > expression2
<	Less than Returns a Boolean value indicating the result of the comparison. expression1 < expression2
>=	Greater than or equal to Returns a Boolean value indicating the result of the comparison. expression1 >= expression2
<=	Less than or equal to Returns a Boolean value indicating the result of the comparison. expression1 <= expression2
AND	Logical AND Performs a logical conjunction on two expressions. $var = expression1 AND expression2
OR	Logical OR Performs a logical disjunction on two expressions. $var = expression1 OR expression2
NOT	Logical NOT Performs logical negation on an expression. $var = NOT expression1