<html lang="en"> <head> <title>SECNDS - The GNU Fortran Compiler</title> <meta http-equiv="Content-Type" content="text/html"> <meta name="description" content="The GNU Fortran Compiler"> <meta name="generator" content="makeinfo 4.13"> <link title="Top" rel="start" href="index.html#Top"> <link rel="up" href="Intrinsic-Procedures.html#Intrinsic-Procedures" title="Intrinsic Procedures"> <link rel="prev" href="SCAN.html#SCAN" title="SCAN"> <link rel="next" href="SECOND.html#SECOND" title="SECOND"> <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage"> <!-- Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc. Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.3 or any later version published by the Free Software Foundation; with the Invariant Sections being ``Funding Free Software'', the Front-Cover Texts being (a) (see below), and with the Back-Cover Texts being (b) (see below). A copy of the license is included in the section entitled ``GNU Free Documentation License''. (a) The FSF's Front-Cover Text is: A GNU Manual (b) The FSF's Back-Cover Text is: You have freedom to copy and modify this GNU Manual, like GNU software. Copies published by the Free Software Foundation raise funds for GNU development.--> <meta http-equiv="Content-Style-Type" content="text/css"> <style type="text/css"><!-- pre.display { font-family:inherit } pre.format { font-family:inherit } pre.smalldisplay { font-family:inherit; font-size:smaller } pre.smallformat { font-family:inherit; font-size:smaller } pre.smallexample { font-size:smaller } pre.smalllisp { font-size:smaller } span.sc { font-variant:small-caps } span.roman { font-family:serif; font-weight:normal; } span.sansserif { font-family:sans-serif; font-weight:normal; } --></style> </head> <body> <div class="node"> <a name="SECNDS"></a> <p> Next: <a rel="next" accesskey="n" href="SECOND.html#SECOND">SECOND</a>, Previous: <a rel="previous" accesskey="p" href="SCAN.html#SCAN">SCAN</a>, Up: <a rel="up" accesskey="u" href="Intrinsic-Procedures.html#Intrinsic-Procedures">Intrinsic Procedures</a> <hr> </div> <h3 class="section">8.209 <code>SECNDS</code> — Time function</h3> <p><a name="index-SECNDS-966"></a><a name="index-time_002c-elapsed-967"></a><a name="index-elapsed-time-968"></a> <dl> <dt><em>Description</em>:<dd><code>SECNDS(X)</code> gets the time in seconds from the real-time system clock. <var>X</var> is a reference time, also in seconds. If this is zero, the time in seconds from midnight is returned. This function is non-standard and its use is discouraged. <br><dt><em>Standard</em>:<dd>GNU extension <br><dt><em>Class</em>:<dd>Function <br><dt><em>Syntax</em>:<dd><code>RESULT = SECNDS (X)</code> <br><dt><em>Arguments</em>:<dd> <p><table summary=""><tr align="left"><td valign="top" width="15%"><var>T</var> </td><td valign="top" width="70%">Shall be of type <code>REAL(4)</code>. <br></td></tr><tr align="left"><td valign="top" width="15%"><var>X</var> </td><td valign="top" width="70%">Shall be of type <code>REAL(4)</code>. <br></td></tr></table> <br><dt><em>Return value</em>:<dd>None <br><dt><em>Example</em>:<dd> <pre class="smallexample"> program test_secnds integer :: i real(4) :: t1, t2 print *, secnds (0.0) ! seconds since midnight t1 = secnds (0.0) ! reference time do i = 1, 10000000 ! do something end do t2 = secnds (t1) ! elapsed time print *, "Something took ", t2, " seconds." end program test_secnds </pre> </dl> </body></html>