my function keeps returning the wrong value

TbooleanVALUE showNUMBER ( int number )
{

switch (number)
 {
 case 0: printf("0"); break;
 case 1: printf("1"); break;
 case 2: printf("2"); break;
 case 3: printf("3"); break;
 case 4: printf("4"); break;
 case 5: printf("5"); break;
 case 6: printf("7"); break;
 case 7: printf("8"); break;
 case 8: printf("9"); break;
 case 9: printf("9"); break;
 }

if ( number > 5 )
  return FALSE ;

if ( number < 2 )
  return TRUE;

  return 2;

}