input: Write a function that determines whether a given number is even or odd. The function should take an integer as input and return the string "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(-6) == "Even"
output: def even_or_odd(num):
      if num % 2 == 0:
          return "Even"
      else:
          return "Odd"