But just keep in mind that neural networks beyond 4 layers are often not better. and most work can be done with 3 layers total.. (so that is one hidden one), ha

But just keep in mind that neural networks beyond 4 layers are often not better. and most work can be done with 3 layers total.. (so that is one hidden one), having two hidden ones can just do some things that a 3layer cant. But more then 4 is more often a bad design and usually overkill of layers for most practical usages. Although theoretical there no math limit to the amount of layers in practical terms its more often calculation time that explodes to unless its a simple FANN based network but then still 3 or 4 layers is 95% of the time enough