tf.keras.layers.Dense() called with trailing comma, why?

In the Optional Lab - Neurons & Layers: why is there a comma after the last parameter, activation, here when calling tf.keras.layers.Dense()? What does the trailing comma do?

Hello @Sreeyutha_Ratala,

In that case, it does nothing. It is just allowed there to have a comma, and with or without it won’t make any difference.


I suspect that’s a typo, not a deliberate item.