code: def sqrt(x):
      """Elementwise square root function.
  
      .. math::
         y_i = \\sqrt x_i.
  
      If the value of :math:`x_i` is negative, it returns ``Nan`` for :math:`y_i`
      respect to underlying numpy and cupy specification.
  
      Args:
          x (:class:`~chainer.Variable` or :ref:`ndarray`): Input variable.
  
      Returns:
          ~chainer.Variable: Output variable.
      """
      return Sqrt().apply((x,))[0]
  
imports: import numpy
  from chainer import backend
  from chainer.backends import cuda
  from chainer import function_node
  from chainer import utils
  from chainer.utils import type_check
  import chainerx
label_desc: Use image node_id 1 for calling a global function with example usage: sqrt(x) and returns: Sqrt