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VBA - Constants

VBA - Constants Shout4Education
Constant is a named memory location used to hold a value that CANNOT be changed during the script execution. If a user tries to change a Constant value, the script execution ends up with an error. Constants are declared the same way the variables are declared.
Following are the rules for naming a constant.
  • You must use a letter as the first character.
  • You can't use a space, period (.), exclamation mark (!), or the characters @, &, $, # in the name.
  • Name can't exceed 255 characters in length.
  • You cannot use Visual Basic reserved keywords as variable name.

Syntax

In VBA, we need to assign a value to the declared Constants. An error is thrown, if we try to change the value of the constant.
Const <> As <> = <>

Example

Let us create a button "Constant_demo" to demonstrate how to work with constants.
Private Sub Constant_demo_Click() 
   Const MyInteger As Integer = 42 
   Const myDate As Date = #2/2/2020# 
   Const myDay As String = "Sunday" 
   
   MsgBox "Integer is " & MyInteger & Chr(10) & "myDate is " 
      & myDate & Chr(10) & "myDay is " & myDay  
End Sub

Output

Upon executing the script, the output will be displayed as shown in the following screenshot.
VBA - Constants Shout For Education

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VBA - Constants
VBA - Constants - VBA Tutorials ... Best VBA Tutorials only @ Shout4Education ... Learn VBA in an Easy and Simplified Way ... Keep Shouting For Education and Keep Learning ... VBA - Constants Shout4Education Constant is a named memory location used to hold a value that CANNOT be changed during the script execution. If a user tries to change a Constant value, the script execution ends up with an error. Constants are declared the same way the variables are declared. Following are the rules for naming a constant. You must use a letter as the first character. You can't use a space, period (.), exclamation mark (!), or the characters @, &, $, # in the name. Name can't exceed 255 characters in length. You cannot use Visual Basic reserved keywords as variable name. Syntax In VBA, we need to assign a value to the declared Constants. An error is thrown, if we try to change the value of the constant. Const <> As <> = <> Example Let us create a button "Constant_demo" to demonstrate how to work with constants. Private Sub Constant_demo_Click() Const MyInteger As Integer = 42 Const myDate As Date = #2/2/2020# Const myDay As String = "Sunday" MsgBox "Integer is " & MyInteger & Chr(10) & "myDate is " & myDate & Chr(10) & "myDay is " & myDay End Sub Output Upon executing the script, the output will be displayed as shown in the following screenshot. VBA - Constants Shout For Education @ Shout 4 Education , @ Shout For Education
https://1.bp.blogspot.com/-6xBCiWeXIsc/XoZMSCtu_6I/AAAAAAAAA40/L-2muAnBbkEdiOgs7Ja3hJoFd8-3ofuuQCPcBGAYYCw/s640/VBA_Tutorials_Shout4Education.jpg
https://1.bp.blogspot.com/-6xBCiWeXIsc/XoZMSCtu_6I/AAAAAAAAA40/L-2muAnBbkEdiOgs7Ja3hJoFd8-3ofuuQCPcBGAYYCw/s72-c/VBA_Tutorials_Shout4Education.jpg
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