[Hal]

pawn Код:

command(stats,playerid, params[])
{
     #pragma unused params
     if(Kills[playerid] != 0)
     {
              //DO CMD HERE
      }
      else
      {
             SendClientMessage(playerid, WHITE, "You Do Not Have Any Kills!");
      }
      return 1;
}

Read up on how to use/make variables.