# numpy.mod

numpy.mod(x1, x2, /, out=None, *, where=True, casting='same_kind', order='K', dtype=None, subok=True[, signature, extobj]) = <ufunc 'remainder'>

  Returns the element-wise remainder of division.

  Computes the remainder complementary to the `floor_divide` function. It is equivalent to the Python modulus operator``x1 % x2`` and has the same sign as the divisor x2. The MATLAB function equivalent to `np.remainder` is `mod`.

  Warning

  This should not be confused with:

  - Python 3.7’s `math.remainder` and C’s `remainder`, which computes the IEEE remainder, which are the complement to `round(x1 / x2)`.

  - The MATLAB `rem` function and or the C `%` operator which is the complement to `int(x1 / x2)`.

  Parameters:
    x1 array_like

      Dividend array.

    x2 array_like

      Divisor array. If `x1.shape != x2.shape`, they must be broadcastable to a common shape (which becomes the shape of the output).

    out ndarray, None, or tuple of ndarray and None, optional

      A location into which the result is stored. If provided, it must have a shape that the inputs broadcast to. If not provided or None, a freshly-allocated array is returned. A tuple (possible only as a keyword argument) must have length equal to the number of outputs.

    where array_like, optional

      This condition is broadcast over the input. At locations where the condition is True, the out array will be set to the ufunc result. Elsewhere, the out array will retain its original value. Note that if an uninitialized out array is created via the default `out=None`, locations within it where the condition is False will remain uninitialized.

    **kwargs

      For other keyword-only arguments, see the ufunc docs.

  Returns:
    y ndarray

      The element-wise remainder of the quotient `floor_divide(x1, x2)`. This is a scalar if both x1 and x2 are scalars.

  See also

  `floor_divide`

    Equivalent of Python `//` operator.

  `divmod`

    Simultaneous floor division and remainder.

  `fmod`

    Equivalent of the MATLAB `rem` function.

  `divide`, `floor`

  Notes

  Returns 0 when x2 is 0 and both x1 and x2 are (arrays of) integers. `mod` is an alias of `remainder`.

  Examples

      >>> np.remainder([4, 7], [2, 3])
      array([0, 1])
      >>> np.remainder(np.arange(7), 5)
      array([0, 1, 2, 3, 4, 0, 1])

  The `%` operator can be used as a shorthand for `np.remainder` on ndarrays.

      >>> x1 = np.arange(7)
      >>> x1 % 5
      array([0, 1, 2, 3, 4, 0, 1])