input: Write a python function to check if a number is within a given range (inclusive).
  assert check_in_range(5, 25, 50) == False
  assert check_in_range(25, 25, 50) == True
  assert check_in_range(50, 25, 50) == True
  assert check_in_range(30, 25, 50) == True
  assert check_in_range(51, 25, 50) == False
output: def check_in_range(number, start, end):
      return start <= number <= end