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

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<a name="DIGITS-_002d_002d_002d-Significant-binary-digits-function"></a>
<h3 class="section">9.85 <code>DIGITS</code> &mdash; Significant binary digits function</h3>
<a name="index-DIGITS"></a>
<a name="index-model-representation_002c-significant-digits"></a>

<dl compact="compact">
<dt><em>Description</em>:</dt>
<dd><p><code>DIGITS(X)</code> returns the number of significant binary digits of the internal
model representation of <var>X</var>.  For example, on a system using a 32-bit
floating point representation, a default real number would likely return 24.
</p>
</dd>
<dt><em>Standard</em>:</dt>
<dd><p>Fortran 95 and later
</p>
</dd>
<dt><em>Class</em>:</dt>
<dd><p>Inquiry function
</p>
</dd>
<dt><em>Syntax</em>:</dt>
<dd><p><code>RESULT = DIGITS(X)</code>
</p>
</dd>
<dt><em>Arguments</em>:</dt>
<dd><table>
<tr><td width="15%"><var>X</var></td><td width="70%">The type may be <code>INTEGER</code> or <code>REAL</code>.</td></tr>
</table>

</dd>
<dt><em>Return value</em>:</dt>
<dd><p>The return value is of type <code>INTEGER</code>.
</p>
</dd>
<dt><em>Example</em>:</dt>
<dd><div class="smallexample">
<pre class="smallexample">program test_digits
    integer :: i = 12345
    real :: x = 3.143
    real(8) :: y = 2.33
    print *, digits(i)
    print *, digits(x)
    print *, digits(y)
end program test_digits
</pre></div>
</dd>
</dl>


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