RosettaCodeData/Task/Factorial/FutureBasic/factorial.basic

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window 1, @"Factorial", ( 0, 0, 300, 550 )
local fn factorialIterative( n as long ) as double
double f
long i
if ( n > 1 )
f = 1
for i = 2 to n
f = f * i
next
else
f = 1
end if
end fn = f
local fn factorialRecursive( n as long ) as double
double f
if ( n < 2 )
f = 1
else
f = n * fn factorialRecursive( n -1 )
end if
end fn = f
long i
for i = 0 to 12
print "Iterative:"; using "####"; i; " = "; fn factorialIterative( i )
print "Recursive:"; using "####"; i; " = "; fn factorialRecursive( i )
print
next
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