' FB 1.05.0 Win64

Function sumToLimit(limit As UInteger) As UInteger
  Dim sum As UInteger = 0
  For i As UInteger = 1 To limit
    sum += i
  Next
  Return sum
End Function

Dim As Double start = timer
Dim limit As UInteger = 100000000
Dim result As UInteger = sumToLimit(limit)
Dim ms As UInteger = Int(1000 * (timer - start) + 0.5)
Print "sumToLimit("; Str(limit); ") = "; result
Print "took ";  ms; " milliseconds to calculate"
Print
Print "Press any key to quit"
Sleep