using System;

​

Console.WriteLine("exammple {0}", "nice");

​

//mathmaticstips

​

Math.Pow(2, 8);

Math.Sqrt(256);

Math.Ceiling(10.2);

//up

Math.Floor(10.2);

//below 

Math.Round(10.2);

//inteligent rounding

Math.Min(10, -10);

Math.Max(10, -10);

​

Convert.ToUInt32(120.050);

// a lot of convertss

​

​

string.Format("exammple {0}", "nice");

string.IsNullOrEmpty("");

string.IsNullOrWhiteSpace("    ");

​

var twelve = "Suheil";

twelve.StartsWith("Su");

​

twelve.EndsWith("il");

twelve.Substring(2, 3);

//gives the 2nd and 3 rd letters.

​

"Suheil ,mustaklem,sami,sima".Split(',');

​

​

var val = "123a";

//try

//{

​

//var myint = int.Parse(val);

​

//Console.WriteLine(myint);

//}

//catch (Exception ex)//use exception for specific things not for logic

//{

//  Console.WriteLine(ex.ToString());   

//}

​

int result;

//int.TryParse(val, out result);

//error handling

//var success = int.TryParse(val, out result);

//Console.WriteLine("Succees: {0}", success);

//Console.WriteLine("Fail: {0}", result);

Console.WriteLine(

int.TryParse(val,out result)

    ? result

    : 100);

​