Unary operations

A unary operator is an operator which takes 1 argument, as opposed to a binary operators, which take 2 arguments. All of the unary operators must have numeric variables as their operand.

Below is the list of unary operators:

Operator	Effect
~	negation operator, returns true if its operand is false, returns false if its operand is true
not	same as ~ operator above
+	unary plus, returns its operand
-	unary minus, returns the opposite of its operand