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Declare variables and require declaration before use

Declare variables and require declaration before use: Learning VBA in Excel
Declare variables and require declaration before use: Learning VBA in Excel

The designers of the VBA programming language understood that many of the users who create their own code will not be professional programmers. Rather than enforcing some of the best practices—such as naming all of your variables before you use them in your code—the VBA language lets you create variables in the middle of a subroutine, or a function, without declaring them earlier.

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