input: Write a function to print Fibonacci series up to a given number. The function should accept an integer as an input and should print the Fibonacci series up to that number.
  
  def print_fibonacci_series(n):
      if n <= 0:
          print("Incorrect input")
          return
      a, b = 0, 1
      while a <= n:
          print(a, end=" ")
          a, b = b, a + b
      print()
  
  n = int(input("Enter a number: "))
  print_fibonacci_series(n)
  
  assert print_fibonacci_series(0)==None
  # Output: Incorrect input
  
  assert print_fibonacci_series(5)==None
  # Output: 0 1 1 2 3 5 
  
  assert print_fibonacci_series(13)==None
  # Output: 0 1 1 2 3 5 8 13 
  
  assert print_fibonacci_series(-1)==None
  # Output: Incorrect input
output: def print_fibonacci_series(n):
      if n <= 0:
          print("Incorrect input")
          return
      a, b = 0, 1
      while a <= n:
          print(a, end=" ")
          a, b = b, a + b
      print()