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# - EXP0802.als                                                              -
# - afnix example : chapter 8 : example 02                                   -
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# - copyright (c) 1999-2019 amaury darsch                                    -
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# factorial with a gamma expression

println ((gamma (n) (if (<= n 1) 1 (* n (self (- n 1))))) 5)
