import math

times = 0

def f(x):
  try:
    x = math.sqrt(x)
  except ValueError:
    print('Invalid Number')
    return
  times += 1
  print(str(x))
  if x > 2:
    f(x)
  else:
    print(str(times))
  return

while True
  try:
    number = float(input("Put a number bigger then 2:"))
    break
  except ValueError:
    print("Oops!  That was no valid number.  Try again...")
f(number)