Data Type

All data stored in BACKND are in a string format.
To allow each data type to be recognized, all pieces of data have their types as key values.

Classification	Data Type	Description
BOOL	bool	Includes the data in boolean format.
N	numbers	Includes all number type data, such as int, float, and double.
S	string	Includes all data in string format.
L	list	Includes data in list format.
M	map	Includes data in map and dictionary formats.
NULL	null	Includes data that does not have a value.

Identifying the data format of the JSON value to be returned

Method that returns the data format of Jsondata's key

public static string WhichDataTypeIsIt(BACKND.LitJson.JsonData data, string key)
{
    if(data.Keys.Contains(key))
    {
        if(data[key].Keys.Contains("S")) // string
            return "S";
        else if(data[key].Keys.Contains("N")) // number
            return "N";
        else if(data[key].Keys.Contains("M")) // map
            return "M";
        else if(data[key].Keys.Contains("L")) // list
            return "L";
        else if(data[key].Keys.Contains("BOOL")) // boolean
            return "BOOL";
        else if(data[key].Keys.Contains("NULL")) // null
            return "NULL";
        else
            return null;
    }
    else
    {
        return null;
    }
}

Method that returns the data format of the nth value of JsonData in a list format

public static string WhichDataTypeIsIt(BACKND.LitJson.JsonData data, int n)
{
    if(data.IsArray)
    {
        if(data[n].Keys.Contains("S")) // string
            return "S";
        else if(data[n].Keys.Contains("N")) // number
            return "N";
        else if(data[n].Keys.Contains("M")) // map
            return "M";
        else if(data[n].Keys.Contains("L")) // list
            return "L";
        else if(data[n].Keys.Contains("BOOL")) // boolean
            return "BOOL";
        else if(data[n].Keys.Contains("NULL")) // null
            return "NULL";
        else
            return null;
    }
    else
    {
        return null;
    }
}