01DataTypeFinder with 4. & .4 is double

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace _01DataTypeFinder
{
    class Program
    {
        static void Main(string[] args)
        {
            string input = Console.ReadLine();

            int position = 0;
            string dataType = "";
            int countAllSymbol = 0;
            int countSymbol = 0;
            int countPoint = 0;
            int countMinus = 0;
            int countOther = 0;
            int countDigit = 0;
            char charSymbol = ' ';
            int beforePoint = 0;
            int afterPoint = 0;
            int beforeDigitMinus = 0;
            int afterDigitMinus = 0;
            char firstSymbol = ' ';
            char secondSymbol = ' ';
            int integer = 0;
            double floating = 0.0;
            while (input != "END")
            {
                foreach (var item in input)
                {
                    if (Char.IsDigit(item) == true)
                    {
                        countDigit++;
                        position = (int)Char.GetNumericValue(item);
                        countAllSymbol++;
                        if (countPoint == 0 && countAllSymbol > 0)
                        {
                            beforePoint++;
                        }
                        else if (charSymbol == '.')
                        {
                            afterPoint++;
                        }
                        if (countMinus == 1 && countSymbol == 1)
                        {
                            beforeDigitMinus++;
                        }
                        else if (charSymbol == '-')
                        {
                            afterDigitMinus++;
                        }
                        if (input.Length == countAllSymbol && countOther == 0 && countPoint == 0 && countMinus <= 1 && afterDigitMinus >= 0)
                        {
                            integer = int.Parse(input);
                            if (position == 0 && beforeDigitMinus == 1)
                            {
                                dataType = "string";
                            }
                            else if (integer % 1 == 0)
                            {
                                dataType = "integer";
                                break;
                            }
                        }
                    }
                    else
                    {
                        countAllSymbol++;
                        countSymbol++;
                        charSymbol = item;
                        if (charSymbol == '.')
                        {
                            countPoint++;
                        }
                        else if (charSymbol == '-' && countDigit >= 0)
                        {
                            if (afterPoint >= 1)
                            {
                                countMinus++;
                            }
                            else if (countDigit >= 1)
                            {
                                afterDigitMinus++;
                            }
                            countMinus++;
                        }
                        else
                        {
                            countOther++;
                        }
                        if (countSymbol == 1)
                        {
                            firstSymbol = charSymbol;
                        }
                        else if (countSymbol == 2)
                        {
                            secondSymbol = charSymbol;
                        }

                    }
                    if (input.Length == countAllSymbol && countPoint == 1 && input.Length > 1 && afterDigitMinus == 0 && countAllSymbol != countSymbol)
                    {
                        if ((beforePoint >= 0 || afterPoint >= 0) && countMinus <= 1 && countOther == 0 && (firstSymbol == '-' || secondSymbol == '.') && countDigit > 0)
                        {
                            if (position == 0)
                            {
                                dataType = "string";
                            }
                            else
                            {
                                dataType = "floating point";
                            }
                        }
                        else
                        {
                            if (firstSymbol == '.' && secondSymbol != '-' && countSymbol > 2 && countOther == 0)
                            {
                                dataType = "floating point";
                            }
                            else
                            {
                                if (firstSymbol == '.' && countSymbol == 1)
                                {
                                    dataType = "floating point";
                                }
                                else
                                {
                                    dataType = "string";
                                }
                            }
                        }
                    }
                    else if (input.Length == 1 && Char.IsDigit(item) != true)
                    {
                        dataType = "character";
                    }
                    else if (input == "true" || input == "false")
                    {
                        dataType = "boolean";
                    }
                    else if (input.Length > 1 && input.Length == countAllSymbol || afterDigitMinus >= 1)
                    {
                        dataType = "string";
                    }
                }
                beforePoint = 0;
                afterPoint = 0;
                beforeDigitMinus = 0;
                afterDigitMinus = 0;
                charSymbol = ' ';
                firstSymbol = ' ';
                secondSymbol = ' ';
                countPoint = 0;
                countMinus = 0;
                countOther = 0;
                countAllSymbol = 0;
                countSymbol = 0;
                countDigit = 0;
                Console.WriteLine($"{input} is {dataType} type");
                input = Console.ReadLine();
            }
        }
    }
}