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Apr 20th, 2019
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  1. def fib(x):
  2. if x in [0,1]:
  3. return 1
  4.  
  5. b1 = 1
  6. b2 = 1
  7. index = 1
  8. while index < x:
  9. b2,b1 = (b2 + b1,b2)
  10. index = index + 1
  11.  
  12. return b2
  13.  
  14. print(fib(4))
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