Specific output value will be shown at the runtime of Executor. Detailed process will be explained later.
Specific output value will be shown at the runtime of Executor. There are two ways to get runtime Variable value. The first way is to use `paddle.fluid.layers.Print` to create a print op that will print the tensor being accessed. The second way is to add Variable to Fetch_list.
For more information on how to use the Print API, please refer to [Print operator](https://www.paddlepaddle.org.cn/documentation/docs/en/1.5/api/layers/control_flow.html#print).
Detailed process of the second way Fetch_list will be explained later.