I didn't downvote you, but I think know why you're getting downvoted. Your comment tipifies laziness and your reaction to the downvotes smacks of entitlement. I'm sorry if that feels rude or offends you. I'm really trying to not be mean about it.

You're not actually trying to gain knowledge; you're just begging for a knowledge handout for something that would be obvious even from just a cursory web search and a quick review of the relevant Wikipedia article (which is probably the top non-sponsored result). That shit gets old real fast. Sometimes you really do just have to RTFM.