input: Write a function to check if a number is even or odd.
  assert check_even_odd(4) == "Even"
  assert check_even_odd(7) == "Odd"
  assert check_even_odd(0) == "Even"
output: def check_even_odd(number):
      if number % 2 == 0:
          return "Even"
      else:
          return "Odd"