input: Write a function to check whether a number is even or odd. If the number is even, print "Even". If the number is odd, print "Odd".
  def is_even(n):
      if n % 2 == 0:
          print("Even")
      else:
          print("Odd")
  
  assert is_even(4)=="Even"
  assert is_even(3)=="Odd"
  assert is_even(0)=="Even"
  assert is_even(-1)=="Odd"
  assert is_even(-2)=="Even"
output: def is_even(n):
      if n % 2 == 0:
          print("Even")
      else:
          print("Odd")