Add doc on compatibility between variables and arrays

chainer · Nov 14, 2018 · b28494a · b28494a
1 parent 65f3e7f
commit b28494a
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/docs/source/reference/functions.rst b/docs/source/reference/functions.rst
@@ -4,7 +4,9 @@ Functions
 .. module:: chainer.functions
 
 Chainer provides variety of built-in function implementations in :mod:`chainer.functions` package.
-These functions return a :class:`~chainer.Variable` object or a tuple of multiple :class:`~chainer.Variable` objects.
+These functions usually return a :class:`~chainer.Variable` object or a tuple of multiple :class:`~chainer.Variable` objects.
+For a :class:`~chainer.Variable` argument of a function, an :ref:`ndarray` can be passed if you do not need its gradient.
+Some functions additionally supports scalar arguments.
 
 .. note::
     Functions implemented in Chainer consists of the following two parts: