23 lines
629 B
Forth
23 lines
629 B
Forth
(function factorial [
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(default-space:space-address <- new space:literal 30:literal)
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(n:integer <- next-input)
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{ begin
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; if n=0 return 1
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(zero?:boolean <- equal n:integer 0:literal)
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(break-unless zero?:boolean)
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(reply 1:literal)
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}
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; return n*factorial(n-1)
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(x:integer <- subtract n:integer 1:literal)
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(subresult:integer <- factorial x:integer)
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(result:integer <- multiply subresult:integer n:integer)
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(reply result:integer)
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])
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(function main [
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(1:integer <- factorial 5:literal)
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($print (("result: " literal)))
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(print-integer nil:literal/terminal 1:integer)
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($print (("\n" literal)))
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])
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