input: Write a function to print out the Fibonacci series up to n numbers where n is a user input.
  def fibonacci_series(n):
      if n <= 0:
          print("No numbers to display.")
          return
      a, b = 0, 1
      print("Fibonacci Series:")
      print(a, b, end=" ")
      for i in range(2, n):
          c = a + b
          a, b = b, c
          print(c, end=" ")
      print()
  
  assert fibonacci_series(10)
  assert fibonacci_series(0)
  assert fibonacci_series(5)
  assert fibonacci_series(-1)
output: def fibonacci_series(n):
      if n <= 0:
          print("No numbers to display.")
          return
      a, b = 0, 1
      print("Fibonacci Series:")
      print(a, b, end=" ")
      for i in range(2, n):
          c = a + b
          a, b = b, c
          print(c, end=" ")
      print()