GETARG (The GNU Fortran Compiler)

### 8.129 `GETARG` — Get command line arguments ¶

Synopsis:

  `CALL GETARG(POS, VALUE)`

Description:

  Retrieve the POS-th argument that was passed on the command line when the containing program was invoked.

  This intrinsic routine is provided for backwards compatibility with GNU Fortran 77. In new code, programmers should consider the use of the `GET_COMMAND_ARGUMENT` — Get command line arguments intrinsic defined by the Fortran 2003 standard.

Class:

  Subroutine

Arguments:

  POS | Shall be of type `INTEGER` and not wider than the default integer kind; POS \geq 0
  VALUE | Shall be of type `CHARACTER` and of default kind.

Return value:

  After `GETARG` returns, the VALUE argument holds the POSth command line argument. If VALUE cannot hold the argument, it is truncated to fit the length of VALUE. If there are less than POS arguments specified at the command line, VALUE is filled with blanks. If POS = 0, VALUE is set to the name of the program (on systems that support this feature).

Example:

      PROGRAM test_getarg
        INTEGER :: i
        CHARACTER(len=32) :: arg

        DO i = 1, iargc()
          CALL getarg(i, arg)
          WRITE (*,*) arg
        END DO
      END PROGRAM

Standard:

  GNU extension

See also:

  GNU Fortran 77 compatibility function:
  `IARGC` — Get the number of command line arguments
  Fortran 2003 functions and subroutines:
  `GET_COMMAND` — Get the entire command line,
  `GET_COMMAND_ARGUMENT` — Get command line arguments,
  `COMMAND_ARGUMENT_COUNT` — Get number of command line arguments