Hello,

My name is Anthony i have few question about Haskell.

I was reading a tutorial everything goes well. but now i have few things that i dont understang.

HERE:

boomBangs xs = [ if x < 10 then "BOOM!" else "BANG!" | x <- xs, odd x]



I dont understand this line except the "if" "then" "else". 
What is xs?
what is the |  ?
 and why doing this  "  | x <- xs, odd x]"

why x <- xs????? what is that

and what is odd x?

thx everyone for answer me.