internal class Program
{
    private static void Main(string[] args)//starts the program
    {
        //Declaring variables for the program
        string Surname = "";
        string Input = "";
        string NationalInsuranceNumber = "";
        int Age = 0;
        double TimesTables = 0;
        double Number1 = 0;
        double Number2 = 0;
        Boolean SurnameT = false;
        Boolean AgeT = false;
        Boolean ConvertOK = false;
        Boolean NationalInsuranceNumberT = false;
        Boolean Number1T = false;
        Boolean Number2T = false;

        do//initiates a loop statement
        {
            Console.WriteLine("What is your surname?");//outputs text to user
            Surname = Console.ReadLine();//inputs answer from the user

            if (Surname.Length == 0)//checks the length of the string
            {
                Console.WriteLine("Error - Surname must contain text");//outputs text to the user
            }
            else//if conditions are not met
            {
                Console.WriteLine("Surname is accepted, your surname is " + Surname);//outputs text to the user
                SurnameT = true;//sets a boolean to true
            }
        } while (SurnameT == false);//ends loop when condition is met

        do//initiates a loop statement
        {
            Console.WriteLine("How old are you?");//outputs text to user
            Input = Console.ReadLine();//inputs answer from user
            ConvertOK = int.TryParse(Input, out Age);//converts a string to integer
            if (ConvertOK)
                if (Age < 1)//will use this if condition if the number is less than 1
                {
                    Console.WriteLine("Please enter a valid number");//outputs text to user
                }
                else//if conditions are not met
                {
                    Console.WriteLine("Age is accepted, you are " + Age + " years old");//outputs text to user
                    AgeT = true;//sets a boolean to true
                }
        } while (AgeT == false);//ends loop when condition is met

        do//initiates a loop statement
        {
            Console.WriteLine("What is your national insurance number?");//outputs text to the user
            NationalInsuranceNumber = Console.ReadLine();//inputs answer from user

            if (NationalInsuranceNumber.Length < 9)//will use if answer is less than 9 in length
            {
                Console.WriteLine("National insurance number is too short please give a valid number");//outputs text to user
            }
            else if (NationalInsuranceNumber.Length > 9) //will use condition if answer is more than 9 in length
            {
                Console.WriteLine("National insurance number is too long please give a valid number");//outputs text to user
            }
            else//if conditions are not met
            {
                Console.WriteLine("National insurance number is accepted, it is " + NationalInsuranceNumber);//outputs text to user
                NationalInsuranceNumberT = true;//sets a boolean to true
            }
        } while (NationalInsuranceNumberT == false);//ends loop when condition is met

        Console.WriteLine("Now you will decide on 2 numbers with each including decimal points to multiply eachother");//outputs text to user
        do//initiates a loop statement
        {
            Console.WriteLine("Pick a number between 1 and 10? (With a decimal point)");//outputs text to the user
            Input = Console.ReadLine();//inputs answer from user
            ConvertOK = double.TryParse(Input, out Number1);//converts a string to double
            if (ConvertOK)//if condition is met continue
                if (Number1 < 0.1 || Number1 > 10)//if number is above 10 or below 0 use this condition
                {
                    Console.WriteLine("Please enter a valid number");//outputs text to user
                }
                else//if no other condition is met
                {
                    Console.WriteLine("Number is accepted, your first number is " + Number1);//outputs text to user
                    Number1T = true;//sets a boolean to true
                }
        } while (Number1T == false);//ends lop when condition is met

        do
        {
            Console.WriteLine("Pick a second number between 1 and 10? (With a decimal point)");//outputs text to the user
            Input = Console.ReadLine();//inputs answer from user
            ConvertOK = double.TryParse(Input, out Number2);//converts a string to a double
            if (ConvertOK)//if condition is met continue
                if (Number2 < 0.1 || Number2 > 10)//if number is above 10 or below 0 use this condition
                {
                    Console.WriteLine("Please enter a valid number");//outputs text to the user
                }
                else//in no other condition  is met
                {
                    Console.WriteLine("Number is accepted, your second number is " + Number2);//outputs text to the user
                    Number2T = true;//sets a boolean to true
                }
        } while (Number2T == false);//ends loop when condition is met

        TimesTables = Number1 * Number2;//sets timestables to number1 * number2
        Console.WriteLine("Your final number is " + TimesTables);//outputs text to the user

        Console.WriteLine("Your surname is " + Surname + ", you are " + Age + " years old, your national insurance number is " + NationalInsuranceNumber + " and your multiplied number is " + TimesTables);//outputs text to user

        Console.WriteLine("To end the program please click enter");//outputs text to the user
        Console.ReadKey();//ends the program
    }
}