|---| | [ View source on GitHub](https://github.com/tensorflow/tensorflow/blob/v2.21.0/tensorflow/python/ops/control_flow_v2_toggles.py#L24-L44) | Use control flow v2. tf.compat.v1.enable_control_flow_v2() control flow v2 (cfv2) is an improved version of control flow in TensorFlow with support for higher order derivatives. Enabling cfv2 will change the graph/function representation of control flow, e.g., [`tf.while_loop`](https://www.tensorflow.org/api_docs/python/tf/while_loop) and [`tf.cond`](https://www.tensorflow.org/api_docs/python/tf/cond) will generate functional `While` and `If` ops instead of low-level `Switch`, `Merge` etc. ops. Note: Importing and running graphs exported with old control flow will still be supported. Calling tf.enable_control_flow_v2() lets you opt-in to this TensorFlow 2.0 feature. > [!NOTE] > **Note:** v2 control flow is always enabled inside of tf.function. Calling this function is not required.