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lines 8-42 of file: include/cppad/example/valvector/sum.hpp
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{xrst_begin valvector_ad_sum}
{xrst_spell
   asum
}

Sum The Elements of and AD valvector
####################################
Sum the elements of an AD<valvector> and return the result as one AD<valvector>
with size one.

Syntax
******
| valvector_ad_sum *asum*
| *asum* ( *ax* , *ay* )

ax
**
This CppAD::AD<valvector> is ``const`` and passed by reference.

ay
**
This CppAD::AD<valvector> is passed by reference.
Its input value does not matter.
Upon return, it has size one and its element is the sum of the elements
in *ax* .

{xrst_toc_hidden
   example/valvector/ad_sum.cpp
}
Example
*******
The file :ref:`valvector_ad_sum.cpp-name` is an example and test
of this operation.

{xrst_end valvector_ad_sum}