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<title>The GNU Fortran Compiler: GETARG</title>

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<hr>
<a name="GETARG-_002d_002d_002d-Get-command-line-arguments"></a>
<h3 class="section">9.120 <code>GETARG</code> &mdash; Get command line arguments</h3>
<a name="index-GETARG"></a>
<a name="index-command_002dline-arguments-1"></a>
<a name="index-arguments_002c-to-program-1"></a>

<dl compact="compact">
<dt><em>Description</em>:</dt>
<dd><p>Retrieve the <var>POS</var>-th argument that was passed on the
command line when the containing program was invoked.
</p>
<p>This intrinsic routine is provided for backwards compatibility with 
GNU Fortran 77.  In new code, programmers should consider the use of 
the <a href="GET_005fCOMMAND_005fARGUMENT.html#GET_005fCOMMAND_005fARGUMENT">GET_COMMAND_ARGUMENT</a> intrinsic defined by the Fortran 2003 
standard.
</p>
</dd>
<dt><em>Standard</em>:</dt>
<dd><p>GNU extension
</p>
</dd>
<dt><em>Class</em>:</dt>
<dd><p>Subroutine
</p>
</dd>
<dt><em>Syntax</em>:</dt>
<dd><p><code>CALL GETARG(POS, VALUE)</code>
</p>
</dd>
<dt><em>Arguments</em>:</dt>
<dd><table>
<tr><td width="15%"><var>POS</var></td><td width="70%">Shall be of type <code>INTEGER</code> and not wider than
the default integer kind; <em><var>POS</var> \geq 0</em></td></tr>
<tr><td width="15%"><var>VALUE</var></td><td width="70%">Shall be of type <code>CHARACTER</code> and of default
kind.</td></tr>
<tr><td width="15%"><var>VALUE</var></td><td width="70%">Shall be of type <code>CHARACTER</code>.</td></tr>
</table>

</dd>
<dt><em>Return value</em>:</dt>
<dd><p>After <code>GETARG</code> returns, the <var>VALUE</var> argument holds the
<var>POS</var>th command line argument. If <var>VALUE</var> can not hold the
argument, it is truncated to fit the length of <var>VALUE</var>. If there are
less than <var>POS</var> arguments specified at the command line, <var>VALUE</var>
will be filled with blanks. If <em><var>POS</var> = 0</em>, <var>VALUE</var> is set
to the name of the program (on systems that support this feature).
</p>
</dd>
<dt><em>Example</em>:</dt>
<dd><div class="smallexample">
<pre class="smallexample">PROGRAM test_getarg
  INTEGER :: i
  CHARACTER(len=32) :: arg

  DO i = 1, iargc()
    CALL getarg(i, arg)
    WRITE (*,*) arg
  END DO
END PROGRAM
</pre></div>

</dd>
<dt><em>See also</em>:</dt>
<dd><p>GNU Fortran 77 compatibility function: <a href="IARGC.html#IARGC">IARGC</a>
</p>
<p>Fortran 2003 functions and subroutines: <a href="GET_005fCOMMAND.html#GET_005fCOMMAND">GET_COMMAND</a>,
<a href="GET_005fCOMMAND_005fARGUMENT.html#GET_005fCOMMAND_005fARGUMENT">GET_COMMAND_ARGUMENT</a>, <a href="COMMAND_005fARGUMENT_005fCOUNT.html#COMMAND_005fARGUMENT_005fCOUNT">COMMAND_ARGUMENT_COUNT</a>
</p></dd>
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