input: Write a python function to find the sum of all odd natural numbers within the range l and r.
  assert sum_in_Range(2,5) == 8
  assert sum_in_Range(5,7) == 12
  assert sum_in_Range(7,13) == 40
  
output: def sum_in_Range(l, r):
      return sum(i for i in range(l, r+1) if i % 2 != 0)