#### Previous topic

numpy.random.RandomState.standard_cauchy

#### Next topic

numpy.random.RandomState.standard_gamma

# numpy.random.RandomState.standard_exponential

`RandomState.``standard_exponential`(size=None)

  Draw samples from the standard exponential distribution.

  `standard_exponential` is identical to the exponential distribution with a scale parameter of 1.

  Parameters: | size : int or tuple of ints, optional Output shape. If the given shape is, e.g., `(m, n, k)`, then `m * n * k` samples are drawn. Default is None, in which case a single value is returned.
  Returns: | out : float or ndarray Drawn samples.

  Examples

  Output a 3x8000 array:

      >>> n = np.random.standard_exponential((3, 8000))