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<a name="ALL"></a>
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<a name="ALL-_002d_002d_002d-All-values-in-MASK-along-DIM-are-true"></a>
<h3 class="section">9.14 <code>ALL</code> &mdash; All values in <var>MASK</var> along <var>DIM</var> are true</h3>
<a name="index-ALL"></a>
<a name="index-array_002c-apply-condition"></a>
<a name="index-array_002c-condition-testing"></a>

<dl compact="compact">
<dt><em>Description</em>:</dt>
<dd><p><code>ALL(MASK [, DIM])</code> determines if all the values are true in <var>MASK</var>
in the array along dimension <var>DIM</var>.
</p>
</dd>
<dt><em>Standard</em>:</dt>
<dd><p>Fortran 95 and later
</p>
</dd>
<dt><em>Class</em>:</dt>
<dd><p>Transformational function
</p>
</dd>
<dt><em>Syntax</em>:</dt>
<dd><p><code>RESULT = ALL(MASK [, DIM])</code>
</p>
</dd>
<dt><em>Arguments</em>:</dt>
<dd><table>
<tr><td width="15%"><var>MASK</var></td><td width="70%">The type of the argument shall be <code>LOGICAL</code> and
it shall not be scalar.</td></tr>
<tr><td width="15%"><var>DIM</var></td><td width="70%">(Optional) <var>DIM</var> shall be a scalar integer
with a value that lies between one and the rank of <var>MASK</var>.</td></tr>
</table>

</dd>
<dt><em>Return value</em>:</dt>
<dd><p><code>ALL(MASK)</code> returns a scalar value of type <code>LOGICAL</code> where
the kind type parameter is the same as the kind type parameter of
<var>MASK</var>.  If <var>DIM</var> is present, then <code>ALL(MASK, DIM)</code> returns
an array with the rank of <var>MASK</var> minus 1.  The shape is determined from
the shape of <var>MASK</var> where the <var>DIM</var> dimension is elided. 
</p>
<dl compact="compact">
<dt>(A)</dt>
<dd><p><code>ALL(MASK)</code> is true if all elements of <var>MASK</var> are true.
It also is true if <var>MASK</var> has zero size; otherwise, it is false.
</p></dd>
<dt>(B)</dt>
<dd><p>If the rank of <var>MASK</var> is one, then <code>ALL(MASK,DIM)</code> is equivalent
to <code>ALL(MASK)</code>.  If the rank is greater than one, then <code>ALL(MASK,DIM)</code>
is determined by applying <code>ALL</code> to the array sections.
</p></dd>
</dl>

</dd>
<dt><em>Example</em>:</dt>
<dd><div class="smallexample">
<pre class="smallexample">program test_all
  logical l
  l = all((/.true., .true., .true./))
  print *, l
  call section
  contains
    subroutine section
      integer a(2,3), b(2,3)
      a = 1
      b = 1
      b(2,2) = 2
      print *, all(a .eq. b, 1)
      print *, all(a .eq. b, 2)
    end subroutine section
end program test_all
</pre></div>
</dd>
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