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<title>The GNU Fortran Compiler: SECNDS</title>
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<a name="SECNDS"></a>
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<p>
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Next: <a href="SECOND.html#SECOND" accesskey="n" rel="next">SECOND</a>, Previous: <a href="SCAN.html#SCAN" accesskey="p" rel="prev">SCAN</a>, Up: <a href="Intrinsic-Procedures.html#Intrinsic-Procedures" accesskey="u" rel="up">Intrinsic Procedures</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Option-Index.html#Option-Index" title="Index" rel="index">Index</a>]</p>
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<hr>
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<a name="SECNDS-_002d_002d_002d-Time-function"></a>
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<h3 class="section">9.228 <code>SECNDS</code> — Time function</h3>
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<a name="index-SECNDS"></a>
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<a name="index-time_002c-elapsed-3"></a>
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<a name="index-elapsed-time-1"></a>
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<dl compact="compact">
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<dt><em>Description</em>:</dt>
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<dd><p><code>SECNDS(X)</code> gets the time in seconds from the real-time system clock.
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<var>X</var> is a reference time, also in seconds. If this is zero, the time in
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seconds from midnight is returned. This function is non-standard and its
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use is discouraged.
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</p>
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</dd>
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<dt><em>Standard</em>:</dt>
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<dd><p>GNU extension
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</p>
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</dd>
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<dt><em>Class</em>:</dt>
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<dd><p>Function
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</p>
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</dd>
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<dt><em>Syntax</em>:</dt>
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<dd><p><code>RESULT = SECNDS (X)</code>
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</p>
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</dd>
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<dt><em>Arguments</em>:</dt>
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<dd><table>
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<tr><td width="15%"><var>T</var></td><td width="70%">Shall be of type <code>REAL(4)</code>.</td></tr>
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<tr><td width="15%"><var>X</var></td><td width="70%">Shall be of type <code>REAL(4)</code>.</td></tr>
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</table>
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</dd>
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<dt><em>Return value</em>:</dt>
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<dd><p>None
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</p>
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</dd>
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<dt><em>Example</em>:</dt>
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<dd><div class="smallexample">
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<pre class="smallexample">program test_secnds
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integer :: i
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real(4) :: t1, t2
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print *, secnds (0.0) ! seconds since midnight
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t1 = secnds (0.0) ! reference time
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do i = 1, 10000000 ! do something
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end do
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t2 = secnds (t1) ! elapsed time
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print *, "Something took ", t2, " seconds."
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end program test_secnds
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</pre></div>
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</dd>
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