using System;

public class Program

{

    public static void Main()

    {

        //1. Read string from the user and show the length of the name string

        Console.WriteLine("Please enter your name");

        string STRname = Console.ReadLine();   //Read string from the user

        Console.WriteLine(STRname.Length);     // Print out Length of Name

        Console.WriteLine("===================");

​

        //2. Transformations (upper and lower case)

        string strTransformation = "My FIrst stRinG.";

        Console.WriteLine(strTransformation.ToLower());    //Print lower case

        Console.WriteLine(strTransformation.ToUpper());    // Print upper case

        Console.WriteLine("===================");

​

        //3. Trimming

        string strTrim = " my   string         test    ";

        Console.WriteLine(strTrim.Trim());                                      //print out trimming content

        Console.WriteLine("===================");

​

        //4. Search

        string strSample = "Is it a book?";

        //[Code] Does this string contain a period?

        bool bolHasPeriod;

        bolHasPeriod = strSample.Contains(".");

        Console.WriteLine("Is there a peiod: {0}",bolHasPeriod);

​

         //[Code] Does this string start with "Is"?

        bool bolIsStartWithIs;

        bolIsStartWithIs = strSample.StartsWith("Is");

        Console.WriteLine("Does it start with \"Is\": {0}",bolIsStartWithIs);

         //[Code] Does this string end with a question mark?

        bool bolIsQuestion;

        bolIsQuestion = strSample.EndsWith("?");

        Console.WriteLine("Does it end with \"?\": " + bolIsQuestion);

        //[Code] Where is the first "n"?

        strSample = "Indiana University";

        int intN;

        intN = strSample.IndexOf("n");

        Console.WriteLine("intN:" + intN);

        Console.WriteLine("=========================");

​

        //5. Substring

        string strEmail = "superman@iu.edu";

        //[Code] print out username

        string strUser;

        strUser = strEmail.Substring(0,8);

        Console.WriteLine("User is: {0}",strUser);

        //[Code] print out domain name

        string strDomain;

        strDomain = strEmail.Substring(8);

        Console.WriteLine("Domain is: {0}",strDomain);

        Console.WriteLine("===================");

​

        //6. Replace, Remove, Insert

        string strPhone = "812.212.3456";

        //[Code] Replace . with *

        strPhone = strPhone.Replace(".","*");

        Console.WriteLine("strPhone:" + strPhone);

        strPhone = "812.212.3456";

        //[Code] Remove "212"

        strPhone = strPhone.Remove(4,3);        

        Console.WriteLine("strPhone:" + strPhone);

        strPhone = "8122123456";

        //[Code] Add (). For instance: (812)2123456

       strPhone = strPhone.Insert(0,"(");

       strPhone = strPhone.Insert(4,")");

        Console.WriteLine("strPhone:" + strPhone);

        Console.WriteLine("===================");

    }

}