what do they do?...

[palistov]

That's a loop. It translates into "For every integer between 0 and less than 10, inclusive of 0, give the player 1 tinderbox". It will give the player 10 tinderboxes.

For loops are very handy. Toy around with them, I'm sure you'll find great uses for them

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Cases are used in switch functions. They're basically step-wise functions that are executed based on a variable. In vernacular it means "if the designated variable is 1, execute case 1; if the designated variable is 2, execute case 2; etc"

They're handy in a wide variety of functions. I suggest you master them, you'll find scripting events, puzzles, even your soundscape MUCH easier.