An operator is a symbol that specifies an action to be performed on one or two values (operands). For example, addition of two numbers.
The precedence in which the operators are evaluated is as follows:
|1||+, -, PRIOR, CONNECT_BY_ROOT||As unary operators (for example, in case of a negative number)|
|3||*, /||Multiplication and division|
|4||+, -||Binary operators addition and subtraction|