Dialog Response

Hello,

I am using this code for one of my dialogs, to save weapons.

This code is supposed not to allow players to input unknown weapon ids

Code:

                                        if(strval(inputtext) == 35 || strval(inputtext) == 36 || strval(inputtext) == 39 || strval(inputtext) == 44 || strval(inputtext) == 45|| strval(inputtext) == 40) return SCM(playerid, -1, ""er"You can not insert this weapon.");
                                                if(strval(inputtext) == 38 && PlayerData[playerid][e_level] != MAX_ADMIN_LEVEL) return SCM(playerid, -1, ":"er"You can not insert this weapon.");
                                        if(strval(inputtext) <= 0 && strval(inputtext) >= 47)

So, I have a problem and a question.

Problem: The code which I mentioned above, does nothing, players can still input any number.
Question: How do I not allow them to type letters? I mean, I want to allow them to only type numbers.

Full code:

Code:

                case DIALOG_WEAPON_SLOT1:
                {
                    if(response)
                    {
                        if(PlayerData[playerid][e_gc] >= 100 || PlayerData[playerid][e_vip] == 1)
                        {
                                        if(strval(inputtext) == 35 || strval(inputtext) == 36 || strval(inputtext) == 39 || strval(inputtext) == 44 || strval(inputtext) == 45|| strval(inputtext) == 40) return SCM(playerid, -1, ""er"You can not insert this weapon.");
                                                if(strval(inputtext) == 38 && PlayerData[playerid][e_level] != MAX_ADMIN_LEVEL) return SCM(playerid, -1, ":"er"You can not insert this weapon.");
                                        if(strval(inputtext) <= 0 && strval(inputtext) >= 47)
                                                {
                                                    if(strval(inputtext) == 20)
                                                    {
                                                                SCM(playerid, -1, ""er"Invalid weapon ID provided!");
                                                                return 1;
                                                        }
                                                        SCM(playerid, -1, ""er"Invalid weapon ID provided!");
                                                        return 1;
                                                }


                                                if(PlayerData[playerid][e_vip] != 1)
                                                {
                                                    PlayerData[playerid][e_gc] = PlayerData[playerid][e_gc] - 100;
                                                        PlayerData[playerid][e_weapon1] = strval(inputtext);
                                                        SCM(playerid, -1, "{90C3D4}[GC SHOP]{FFFFFF} You have adjusted your first weapon slot for {FF0000}100 {FFFFFF}GC.");
                                                }
                                                else if(PlayerData[playerid][e_vip] == 1)
                                                {
                                                        PlayerData[playerid][e_weapon1] = strval(inputtext);
                                                        SCM(playerid, -1, "{90C3D4}[GC SHOP]{FFFFFF} You have adjusted your first weapon slot for {FF0000}FREE.");
                                                }
                                        }
                                        else
                                        {
                                            SCM(playerid, -1, ""er"You are not a VIP nor have 100 GC.");
                                        }
                    }
                }

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Dialog Response