Again, I didn't find an account on the subject, still I was able to find a definitive quote:. A part of the original BASIC compiler source code, where it would jump when finding a DIM command, in which you can clearly see the original intention for the keyword:.
Later on it came to be used to declare all kinds of variables, when the possibility to specify the type for variables was added in more recent implementations. Python Javascript Linux Cheat sheet Contact.
Dim have had different meanings attributed to it. Even though, it doesn't say what does Dim stand for, it says on page Now, I got a rewarding surprise later on at page , the title for the section that describes the DIM keyword note: that is not listed in the contents says: DIM dimension of an array So, I didn't get the quote "Dim stands for Again, I didn't find an account on the subject, still I was able to find a definitive quote: Before you can use an array, you must define it in a DIM dimension statement.
Thank you so much for reading and I hope I can continue to provide you with great content in the future! Check out all the free tutorials and VBA code snippets! Create Excel, PowerPoint, Word add-ins with ease with this revolutionary template and online course! Affiliate Program About Example Files. Add-ins Templates Courses. Ask Me Product Help Consulting. I will not go into great detail of all the different variable types but I will list some of the ones I most often use: Range — Stores an Excel range Long — Has the ability to store any number between 2,,, to 2,,, String — Stores text must surround text with quotation marks Worksheet — Stores a Worksheet Boolean — Stores either a True -1 or False 0 value Note, that if you are declaring an Array variable you can also set the parameters of the array by writing the following:.
Why Use Dim? Here are the ones I can think of please leave a comment if you can think of any other reasons and I will add them to the list : Easier for Others to Understand Your Code. If you make it a common practice to have a declaration section in your code, you essentially are creating a vocabulary list that you can reference while you are coding. This will allow you to easily keep track of all your variable names and what values they should have. Helps Prevent Spelling Errors.
Description Declares and allocates storage space in memory for variables. Rules at a Glance In addition to the Visual Basic data types listed in Chapter 3 , type can be an Object, an object type, or a user-defined type.
Variables have the following values when they are first initialized with the Dim statement: Data Type Initial Value Numeric 0 Variable-length string Zero-length string "" Fixed-length string Padded with zeros Variant Empty Object Nothing To use an object variable that has not been declared using the New keyword, the Set statement must assign an object to the variable before it can be used, as An attribute contributes information to the assembly's metadata, which is not meaningful for temporary storage such as local variables.
At module level, you cannot use the Static modifier to declare member variables. At procedure level, you cannot use Shared , Shadows , ReadOnly , WithEvents , or any access modifiers to declare local variables. You can specify what code can access a variable by supplying an accessmodifier. Class and module member variables outside any procedure default to private access, and structure member variables default to public access.
You can adjust their access levels with the access modifiers. You cannot use access modifiers on local variables inside a procedure. You can specify WithEvents only on member variables, not on local variables inside a procedure.
If you specify WithEvents , the data type of the variable must be a specific class type, not Object. You cannot declare an array with WithEvents. For more information about events, see Events. Code outside a class, structure, or module must qualify a member variable's name with the name of that class, structure, or module.
Code outside a procedure or block cannot refer to any local variables within that procedure or block. NET Framework garbage collector disposes of managed resources without any extra coding on your part. However, you can force the disposal of a managed resource instead of waiting for the garbage collector. If a class holds onto a particularly valuable and scarce resource such as a database connection or file handle , you might not want to wait until the next garbage collection to clean up a class instance that's no longer in use.
A class may implement the IDisposable interface to provide a way to release resources before a garbage collection. A class that implements that interface exposes a Dispose method that can be called to force valuable resources to be released immediately. The Using statement automates the process of acquiring a resource, executing a set of statements, and then disposing of the resource. However, the resource must implement the IDisposable interface.
For more information, see Using Statement. The following example declares variables by using the Dim statement with various options. The following example lists the prime numbers between 1 and The scope of local variables is described in code comments. In the following example, the speedValue variable is declared at the class level. The Private keyword is used to declare the variable. The variable can be accessed by any procedure in the Car class.
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