input: 
  def convert_to_binary(num):
       """
       Convert a given integer to its binary representation.
       >>> convert_to_binary(10)
       '1010'
       >>> convert_to_binary(0)
       '0'
       >>> convert_to_binary(7)
       '111'
       """
      if num == 0:
           return '0'
       binary = ''
       while num != 0:
           remainder = num % 2
           binary = str(remainder) + binary
           num = num // 2
        
       return binary
  
output:     if num == 0:
          return '0'
      binary = ''
      while num != 0:
          remainder = num % 2
          binary = str(remainder) + binary
          num = num // 2
      
      return binary