[Yera96]

You're creating an array which isn't needed here.

pawn Код:

public OnPlayerCommandText(playerid, cmdtext[])
{
    if (strcmp("/givemoney", cmdtext, true, 10) == 0)
    {
        new string[100];
        GivePlayerMoney(playerid, 1000);
        format(string,sizeof(string),"[Info] You get %d !",ConvertPrice(1000, 1));
        SendClientMessage(playerid, -1, string);
        return 1;
    }
    return 0;
}

If don't want to remove, then just use single variable.

pawn Код:

public OnPlayerCommandText(playerid, cmdtext[])
{
    if (strcmp("/givemoney", cmdtext, true, 10) == 0)
    {
        new cash = 1000, string[100];
        GivePlayerMoney(playerid, cash);
        format(string,sizeof(string),"[Info] You get %d !",ConvertPrice(cash, 1));
        SendClientMessage(playerid, -1, string);
        return 1;
    }
    return 0;
}

But I prefer to use #define here.