What does Dense do?

Question

What is the meaning of the two Dense in this code?

self.model.add(Flatten())
self.model.add(Dense(512))
self.model.add(Activation('relu'))
self.model.add(Dropout(0.5))
self.model.add(Dense(10))
self.model.add(Activation('softmax'))
self.model.summary()

Answer 1

Dense is the only actual network layer in that model.

A Dense layer feeds all outputs from the previous layer to all its neurons, each neuron providing one output to the next layer.

It's the most basic layer in neural networks.

A Dense(10) has ten neurons. A Dense(512) has 512 neurons.