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lines 9-38 of file: include/cppad/utility/elapsed_seconds.hpp
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{xrst_begin elapsed_seconds}
{xrst_spell
   chrono
}

Returns Elapsed Number of Seconds
#################################

Syntax
******
| # ``include <cppad/utility/elapsed_seconds.hpp>``
| *s* = ``elapsed_seconds`` ()

Accuracy
********
This routine uses ``std::chrono::steady_clock`` to do its timing.

s
*
is a ``double`` equal to the
number of seconds since the first call to ``elapsed_seconds`` .
{xrst_toc_hidden
   speed/example/elapsed_seconds.cpp
}
Example
*******
The routine :ref:`elapsed_seconds.cpp-name` is
an example and test of this routine.

{xrst_end elapsed_seconds}