input: Write a function to print Fibonacci series up to n terms.
  assert printFibo(5)==None
  assert printFibo(0)==None
  assert printFibo(1)==None
output: def printFibo(n):
      if n <= 0:
          return None
      a, b = 0, 1
      for _ in range(n):
          print(a, end=' ')
          a, b = b, a + b
      print()
      return None