There are a variety of operators that work on scalar values and
variables. These operators allow us to manipulate scalars in different
ways. This section discusses the most common of these operators.
2.4.1 Numerical Operators Operators for numeric scalars
2.4.2 Comparison Operators Operators to compare scalars with each other
2.4.3 Auto-Increment and Decrement
2.4.4 String Operators Operators for string scalars