phew! The previous one was answered so fast. : )
I should have specified (for newbies only).
Experts, pls skip this node.

Seems that there are always many newbies lurking around but never had the chance to post replies; either the question was too tough or the masters were too finger-ready.
So I thought I would post some simple questions for newbies to share their knowledge with other newbies as well.

Question: 1..9 and 1-9 both means 1,2,3,4,5,6,7,8,9. So what's the difference between them?

In reply to Quiz 2 (for newbies only) by Eureka_sg

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