input: Write a python function to check if a number is even or odd and print "Even" or "Odd".
  assert is_even(4) == "Even"
  assert is_even(7) == "Odd"
  assert is_even(0) == "Even"
  assert is_even(-2) == "Even"
  assert is_even(-3) == "Odd"
output: def is_even(n):
      if n % 2 == 0:
          return "Even"
      else:
          return "Odd"