array_like or scalar
   The value(s) whose log base 10 is (are) required.

Returns
-------
out : ndarray or scalar
   The log base 10 of the `x` value(s). If `x` was a scalar, so is `out`,
   otherwise an array object is returned.

See Also
--------
numpy.log10

Notes
-----
For a log10() that returns ``NAN`` when real `x < 0`, use `numpy.log10`
(note, however, that otherwise `numpy.log10` and this `log10` are
identical, i.e., both return ``-inf`` for `x = 0`, ``inf`` for `x = inf`,
and, notably, the complex principle value if ``x.imag != 0``).

Examples
--------
>>> import numpy as np

(We set the printing precision so the example can be auto-tested)

>>> np.set_printoptions(precision=4)

>>> np.emath.log10(10**1)
1.0

>>> np.emath.log10([-10**1, -10**2, 10**2])
array([1.+1.3644j, 2.+1.3644j, 2.+0.j    ])

)