code: def exponential(x):
      """Exponential activation function.
  
      Args:
          x: Input tensor.
      """
      return ops.exp(x)
  
imports: from keras import backend
  from keras import ops
  from keras.api_export import keras_export
label_desc: Use image node_id 13 for calling a global function with example usage: exponential(x) and returns: ops