How many type of prisons is it?

There are at least 7 types of prisons in the United States. These are: jails, federal prisons, state prisons, rehabilitation prisons, minimum security, medium security, and maxium security prisons....

There is no set amount. It all depends on the size of the facility.

There are so many different types because they are all used for different purposes in different situations.

Emo screamo, Hardcore screamo, Metal, Pop rock, Rock, Hardcore rock, Hardcore metal, Soft rock, Punk, Hardcore punk, Pop punk, Jazz, Emo, and Rap!! :) Ps. My favorite is Hardcore screamo and Metal!...

Really, none are! That doesn't mean they're edible though.