wat factorial keyword i should use??

in bv mathematic fuction if i wan to use factorial so what is the keyword for factorial???

i use "prev = fact(n) / (fact(n - r))" , why i does not work???

instead of using "fact" what shold i use...

thank you for those who really can help me answer this...

thanks alot in advance 1st... :)

answered in VB forum. Please don't double-post.

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