input: Write a function to determine whether a given number is even or odd. If the number is even return "Even", otherwise return "Odd".
  assert even_or_odd(4)== "Even"
  assert even_or_odd(7)== "Odd"
  assert even_or_odd(0)== "Even"
  assert even_or_odd(-3)== "Odd"
  assert even_or_odd(-6)== "Even"
output: def even_or_odd(n):
      return "Even" if n % 2 == 0 else "Odd"