RosettaCodeData/Task/Factorial/PowerBASIC/factorial.basic

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function fact1#(n%)
local i%,r#
r#=1
for i%=1 to n%
r#=r#*i%
next
fact1#=r#
end function
function fact2#(n%)
if n%<=2 then fact2#=n% else fact2#=fact2#(n%-1)*n%
end function
for i%=1 to 20
print i%,fact1#(i%),fact2#(i%)
next