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  1. : fac ( u -- u! )
  2.   1 swap 1+ 1 u+do
  3.     i *
  4.   loop ;
  5. 5 fac .
  6. 7 fac .
  7.  
  8. see fac
Success #stdin #stdout 0.01s 5284KB
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120 5040 
: fac  
  1 swap 1+ 1 
  U+DO   i * 
  LOOP
  ;
https://ideone.com/qZYCr2
language:
Forth (gforth 0.7.3)
created:
3 hours ago
visibility:
public

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