code: def isnan(x, /):
      """Tests each element x_i of the input array x to determine whether the element is NaN."""
      (x,) = _promote_dtypes("isnan", x)
      return jax.numpy.isnan(x)
  
imports: import jax
  from jax.experimental.array_api._data_type_functions import result_type, isdtype
  import numpy
label_desc: Use image node_id 32 for calling a global function with example usage: isnan() and returns: jax