Visual Basic Statements
A Visual Basic statement is a complete instruction and can contain the following:
Keywords—Predefined words that are reserved for Visual Basic's use such as Using, Dim, etc.
Operators—Symbols used to perform operations, like +,-,*, / etc. which performs addition operations.
Variables— a variable is a facility for storing data and variable name is one used to bind a variable to a memory location; the corresponding value is stored as a data object in that location so that the object can be accessed and manipulated later via the variable's name
Literal values—these are simple values, like 15 or "Test".
Constants—in general constant are non-varying values, i.e. completely fixed or fixed in the context of use. The same as variables, except that constants are assigned a value that cannot then be changed.
Expressions— An expression in a programming language is a combination of values, variables, operators, and functions. For example 5+3 is an arithmetic and programming expression which evaluates to 8