class StatsVC {
    var data = [String : Stats] ()
    var current = "" // The current dataset.
    var currentdata : Stats?;

    you should write a function that returns indexes I1 -> I2 for the add command.

    write a function that sets the current dataset.

    func parseCommands(input){ // Will be seperated by spaces.
        arguments = the input string split by spaces
        check for the command (the command is the first arg){
            argument is add
                Set data of add name to all of the arguments after 1st.
                Set the current to this dataset.
                break;
            argument is current
                Set the current to this dataset.
                break;
            argument is sum
                print the sum of the current dataset
                break;
                //You will need to add the other commands, too.
            argument is write
                convert data to a string and save.
                break;
            argument is read
                convert data to multiple datasets and set "data" to those sets
            argument is help
                print the help screen.
                break
            argument is info
                idek what info is supposed to do
                break;
            not any of the arguments
                tell the user that.
        }
    }

    func runStats (){
        var Input : String?
        repeat{ // Main Loop
            Input = getLineFromConsole()
            if Input != nil && Input != "quit"{ // The input contains a command.
                parseCommands(Input!)
            }else{
                break;
            }
        }while Input != "quit"
    }
}