| Sys.FetchArg | Part of Sys module |
| Syntax | System.FetchArg ( i : int ) : string
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| Description | The Sys.FetchArg function is used to access the i-th argument that has been passed to a program from the command line. For example, if the program is run from the Turing environment using
then Sys.FetchArg (2) will return "file2". If a program called prog.x is run under UNIX using this command:
the value of Sys.FetchArg(2) will similarly be "file2". The Sys.Nargs function, which gives the number of arguments passed to the program, is usually used together with the Sys.FetchArg function. Parameter i passed to Sys.FetchArg must be in the range 0 .. Sys.Nargs. The 0-th argument is the name of the running program.
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| Example | This program lists its own name and its arguments.
put "The name of this program is : ", Sys.FetchArg ( 0 )
for i : 1 .. Sys.Nargs
put "Argument ", i, " is ", Sys.FetchArg ( i )
end for
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| Status | Exported qualified. This means that you can only call the function by calling Sys.FetchArg, not by calling FetchArg.
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| See also | Sys.Nargs
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