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Today, the editor will share with you the relevant knowledge points about how to use the define preprocessor of C#. The content is detailed and the logic is clear. I believe most people still know too much about this knowledge, so share this article for your reference. I hope you can get something after reading this article. Let's take a look at it.

# define preprocessor

The # define preprocessor instruction creates symbolic constants.

# define allows you to define a symbol so that by using the symbol as the expression passed to the # if instruction, the expression will return true. Its syntax is as follows:

# define symbol

The following procedure illustrates this:

Example

# define PI

Using System

Namespace PreprocessorDAppl

{

Class Program

{

Static void Main (string [] args)

{

# if (PI)

Console.WriteLine ("PI is defined")

# else

Console.WriteLine ("PI is not defined")

# endif

Console.ReadKey ()

}

}

}

When the above code is compiled and executed, it produces the following results:

PI is defined above is all the content of this article "how to use the define preprocessor of C#". Thank you for reading! I believe you will gain a lot after reading this article. The editor will update different knowledge for you every day. If you want to learn more knowledge, please pay attention to the industry information channel.

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