BRE: Can we use For/Next loop type when we create rules ?

[GAC.Me.Up.baby]

hello,

i got 2 questions actually :

1. Can we use for/Next loop when we build a rule, i dont see how i can use
it . Does it mean i need to make a external .Net assembly and call it as a
fact ?

if we can do it... without using a external assembly... any code exemple
will be gratly appreciated.

2. I have a bunch of rule to make that are only calculation (formula to
calculate)... i dont have any if.....then condition. How you create those
rules then ?
I need to create those calculation rules in the BRE...so a user can go and
change easily the rule... No .Net code......