out variable declaration sample(C# 7 new feature)

out_variable_declaration.cs

using System;

namespace out_variable_declaration_sample
{
    class Program
    {
        static void Main(string[] args)
        {
            const string integerStr = "5";

            // 一時変数を使う版
            int temp;
            if(int.TryParse(integerStr,out temp))
            {
                Console.WriteLine("temporaly : " + temp);
            }

            //出力変数宣言(out variable declaration)を使う版
            if(int.TryParse(integerStr,out var number)){
                Console.WriteLine("out variable declaration : " + number);
            }

            /*
            出力
            temporaly : 5
            out variable declaration : 5
             */
        }
    }
}