Which keyword is used to declare a constant

Note: The data types of enum are of course limited as we can see in above example. Hence they only define the symbolic name of constant. This article is contributed by Shubham Bansal. If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute. See your article appearing on the GeeksforGeeks main page and help other Geeks.

Skip to content. Change Language. Related Articles. Table of Contents. The Visual Studio edition that you have and the settings that you use determine these elements. For more information, see Personalizing the IDE. Write a declaration that includes an access specifier, the Const keyword, and an expression, as in the following examples:.

The compiler determines the type of the constant from the type of the expression. For more information, see Constant and Literal Data Types. Write a declaration that includes the As keyword and an explicit data type, as in the following examples:. You can declare multiple constants on a single line, although your code is more readable if you declare only a single constant per line. If you declare multiple constants on a single line, they must all have the same access level Public , Private , Friend , Protected , or Protected Friend.

Const Statement. Constant and Literal Data Types. How to: Declare Enumerations. How to: Refer to an Enumeration Member. Enumerations and Name Qualification. You use the const keyword to declare a constant field or a constant local. Constant fields and locals aren't variables and may not be modified.

Constants can be numbers, Boolean values, strings, or a null reference. These values can change over time, and because compilers propagate constants, other code compiled with your libraries will have to be recompiled to see the changes. See also the readonly keyword. For example:.