This week's giveaway is in the EJB and other Java EE Technologies forum. We're giving away four copies of EJB 3 in Action and have Debu Panda, Reza Rahman, Ryan Cuprak, and Michael Remijan on-line! See this thread for details.
2 el is forgiving. it will coerce the operands to fit into the context of operators.
there are vastly different number of combinations of such expressions possible in EL . the best way to do is to make a small program and play with such expressions. cook your own expression , see the results and then analyse it.