How to use the define preprocessor of C#
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:
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