What is string args in Main class for

Question

In C  the Main class has string   args parameter   What is that for and where does it get used

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It s an array of the parameters arguments  hence args  that you send to the program  For example ping 172 16 0 1 -t -4  These arguments are passed to the program as an array of strings   string   args    Array of Strings containing arguments

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The args parameter stores all command line arguments which are given by the user when you run the program   If you run your program from the console like this      program exe there are 4 parameters   Your args parameter will contain the four strings   there    are    4   and  parameters   Here is an example of how to access the command line arguments from the args parameter  example

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Further to everyone else s answer  you should note that the parameters are optional in C  if your application does not use command line arguments   This code is perfectly valid   internal static Program       private static void Main                    Get on with it  without any arguments

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Besides the other answers  You should notice these args can give you the file path that was dragged and dropped on the  exe file  i e if you drag and drop any file on your  exe file then the application will be launched and the arg 0  will contain the file path that was dropped onto it   static void Main string   args        Console WriteLine args 0        this will print the path of the file dropped on the  exe file  e g      C  Users ABCXYZ source repos ConsoleTest ConsoleTest bin Debug ConsoleTest pdb   Hence  looping through the args array will give you the path of all the files that were selected and dragged and dropped onto the  exe file of your console app  See   static void Main string   args        foreach  var arg in args                Console WriteLine arg             Console ReadLine        The code sample above will print all the file names that were dragged and dropped onto it  See I am dragging 5 files onto my ConsoleTest exe app    And here is the output that I get after that

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For passing in command line parameters  For example args 0  will give you the first command line parameter  if there is one

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You must have seen some application that run from the commandline and let you to pass them arguments  If you write one such app in C   the array args serves as the collection of the said arguments   This how you process them   static void Main string   args        foreach  string arg in args             Do something with each argument

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From the C  programming guide on MSDN   The parameter of the Main method is a String array that represents the command-line arguments  So  if I had a program  MyApp exe  like this   class Program     static void Main string   args          foreach  var arg in args              Console WriteLine arg                That I started at the command line like this   MyApp exe Arg1 Arg2 Arg3  The Main method would be passed an array that contained three strings   Arg1    Arg2    Arg3    If you need to pass an argument that contains a space then wrap it in quotes  For example   MyApp exe  Arg 1   Arg 2   Arg 3   Command line arguments commonly get used when you need to pass information to your application at runtime  For example if you were writing a program that copies a file from one location to another you would probably pass the two locations as command line arguments  For example   Copy exe C  file1 txt C  file2 txt

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This is an array of the command line switches pass to the program   E g  if you start the program with the command  myapp exe -c -d  then string   args   will contain the strings  -c  and  -d

[c#] What is "string[] args" in Main class for?

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