[horsemeat]

how to check for numbers

need some help here is the command

Код:

//in some command
new id,input[128],choice[128];
if(sscanf(params,"ss",input,choice)
{
    return SendClientMessge(playerid, RED, "SYNTAX /setplayerlabelstate [playerid/all] [yes/no]");
}
if(strcmp(input,"all",true,64)==0)
{
	
}
else
{
    id = strval(input);
}

now I would like it so the player can enter id 0 but I would also like it to return if player enter anything besides 'all' but I don't want it to run the rest of the code as id 0 when it does not find anything

how do I do this ?