This helps to eliminate spelling errors causing bugs in programs. As Integer Dim numberOfGrades As Integer Dim letterGrade As String Dim aSlug As String Dim stands for dimension. Dim statements set aside memory locations for variables and associate them with their Name, with which they are referenced in scripts. Names are assigned according to convention and should clearly reflect the use of the variable's datum. Currency is a convenient data type to store two-digit decimals, as Dr. Paperbound want his averages reported.
Integers are OK to count small numbers of things.
Strings are collections of characters, sometimes called text, data. The operation is called Concatenation , not Addition. Programmers use the String Operators of VB to handle string data. String's contents are built in VB scripts using quotation marks to add fixed, literal, text to strings used to prompt the user for or to display data. There are several String Operators, this script uses concatenation.