[DarkScripter]

you can use SSCANF width ZCMD to get the player's ID's.

pawn Код:

CMD:mycommand(playerid, params[])
{
    new interator;
    if(ssacnf(params,"i", interator))
        return SendClientMessage(playerid, -1,"/mycommand <number>");
        
    new
        string[100];
    format(string, sizeof(string),"Yoour choose the number %d =)", interator);
    SendClientMessage(playerid, -1, string);
    return 1;
}