input: 
  Write a function in Python to print the Fibonacci series.
  
  def printFibonacciSeries(n): 
    
      # Taking 1st two fibonacci nubers as 0 and 1 
      f1 = 0
      f2 = 1
      print(f1, f2, end = " ") 
    
      for i in range(2, n): 
          next = f1 + f2 
          print(next, end = " ") 
    
          # update values 
          f1 = f2 
          f2 = next
  
  assert printFibonacciSeries(5) == None  # Should print "0 1 1 2 3 "
  assert printFibonacciSeries(8) == None  # Should print "0 1 1 2 3 5 8 13 "
  assert printFibonacciSeries(1) == None  # Should print "0 "
  assert printFibonacciSeries(0) == None  # Should print nothing
  
output:     
      if n <= 0:
          return
      elif n == 1:
          print(f1, end = " ")
      else:
          for i in range(2, n): 
              next = f1 + f2 
              print(next, end = " ") 
    
              # update values 
              f1 = f2 
              f2 = next
          print()
  