input: Write a python function to check if a number is within a given range, including the boundaries.
  assert check_in_range(5, 1, 10) == True
  assert check_in_range(0, 1, 10) == False
  assert check_in_range(10, 1, 10) == True
  assert check_in_range(11, 1, 10) == False
output: def check_in_range(number, start, end):
      return start <= number <= end