[Mike Garber]

I don't know how you would do It, since sscanf searches for either integer/float etc. or a string, not both integer/string.
If you can figure It out though, you should not compare "params" but the string.

I don't think this will work, but try this;
It might work to /bank all but not to /bank 1000 for example.

pawn Код:

dcmd_bank(playerid, params[])
{
    new amount[12];
    if(!sscanf(params,"s[12]",amount))
    {
        if(!sscanf(amount,"all"))
        {
            // Bank all money
        }
        else
        {
            // Normal number
        }
    }
    return 1;
}

I'd suggest doing it with dialogs instead, much easier.