Layers are the only building blocks in Leaf. As we will see later on, everything is a layer. Even when we construct networks, we are still just -working with layers composed of smalle layers. This makes the API clean and expressive.
+working with layers composed of smaller layers. This makes the API clean and expressive.A layer is like a function: given an input it computes an output. It could be some mathematical expression, like Sigmoid, ReLU, or a non-mathematical instruction, like querying data from a database, logging data, or anything in between.