public OnPlayerCommandText(playerid, cmdtext[])
{
    new cmd[30], params[100];
    sscanf(cmdtext, "s[30]s[100]", cmd, params);
    
    if(!strcmp(cmd, "/getweapon"))
    {
        new id = strval(params);
// Right here the ID doesn't just have to be a playerid
// remember pretty much everything in SA:MP is represented by numbers, playerids, cars, weapons etc
// This basic command is pretty much: '/command <number>' [without the '<' and '>' obviously]
// So 'params' is just whatever text the player types after a space in the command.
// And in this example we use 'strval' to convert that string to a number so it can be used in functions that require 'ID' numbers
// Such as player ids, weapon models, vehicle models, any data that is represented by a number in function parameters.


// So you now have your 'id' variable that represents a weapon ID, you now use the variable in the function GivePlayerWeapon, which uses 'weaponid' as a parameter:

        GivePlayerWeapon(playerid, id, 10000); // 'playerid' = player who typed command, 'id' = weapon id they entered after the command
        //[referred to as a 'parameter', similar concept to how functions have parameters, but this is for in-game commands.]
        return 1;
    }
}