input: Write a function to determine if a given number is even or odd. Return "Even" if the number is even, and "Odd" if the number is odd.
  
  def even_or_odd(num):
      if num % 2 == 0:
          return "Even"
      else:
          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(-2) == "Even"
output: def even_or_odd(num):
      if num % 2 == 0:
          return "Even"
      else:
          return "Odd"