html>`_.

Returns
-------
softplus : ndarray
    Logarithm of ``exp(0) + exp(x)``.

Examples
--------
>>> from scipy import special

>>> special.softplus(0)
0.6931471805599453

>>> special.softplus([-1, 0, 1])
array([0.31326169, 0.69314718, 1.31326169])
r