RosettaCodeData/Task/Factorial/FreeBASIC/factorial.freebasic

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' FB 1.05.0 Win64
Function Factorial_Iterative(n As Integer) As Integer
Var result = 1
For i As Integer = 2 To n
result *= i
Next
Return result
End Function
Function Factorial_Recursive(n As Integer) As Integer
If n = 0 Then Return 1
Return n * Factorial_Recursive(n - 1)
End Function
For i As Integer = 1 To 5
Print i; " =>"; Factorial_Iterative(i)
Next
For i As Integer = 6 To 10
Print Using "##"; i;
Print " =>"; Factorial_Recursive(i)
Next
Print
Print "Press any key to quit"
Sleep