learning, C# - rextester

learning

//Rextester.Program.Main is the entry point for your code. Don't change it.
//Compiler version 4.0.30319.17929 for Microsoft (R) .NET Framework 4.5

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;

namespace Rextester
{
    public class Program
    {
       
        public static void Main(string[] args)
        {
            //Your code goes here
           /* Console.WriteLine("Hello, world!");
            int a = 21;
            string firstname = "Anika"; 
            object e = 11; 
            object b = "hi guys"; 
            // object to store universal types.
            int x = 12345;
            Console.WriteLine(Math.Sqrt(x));
            int age = 22; 
            Console.WriteLine("My age is " +age+ " and in 10 years it will be " +(age+10));
 */         /* Random a = new Random ();
            {
            int number = a.Next (1, 100); 
            int number1 = a.Next (1, 100);
            bool Isgreater = (number > number1);
                
                   if (number > number1)
                   {
                        Console.WriteLine(" Number A " + number + " Is bigger than number B " + number1 + " , " + " Is A greater than B? " + Isgreater);
                   }
             
                   if (number <number1)
                   {
                        Console.WriteLine(" Number B " + number1 + " Is bigger than number A " +number + " , " + " Is A greater than B? " + Isgreater);
                   }
               
                
                    if (number == number1)
                    {
                        Console.WriteLine(" Number A " + number + " Is the same as number B " +number1 + " , " + " Is A greater than B? " + Isgreater);
                    }
                // Nullabes are reference ypes so they reference to an object 
            // in the dynamic memory which contains the real value so like pointers. they could have a vlue or they could have NULL.
               // Nullable<int> i1= null;
               // int? i2 = i1; 
            }*/
            // so I assign a as 5 and then in my nullable type i assign ni as I so ni points at is value. 
           
            /*int a = 5;
                int? ni=a; 
                Console.WriteLine(ni);
            Nullable <int> i1 = null; 
            int? i2 = i1; 
            Console.WriteLine(i2);
            // the top should give me nothing but I can check if a variable has a value or not by using the following: 
            Console.WriteLine (ni.HasValue);
            Console.WriteLine (i2.HasValue);
            // then to giev the value the other way we have to do this:
            //i1 = i2.Value; //this will giev system.invalueoperationexception so we do something special to giev the null value a default number which is 0 cuz its easier to read. 
            a = ni.Value; 
            //Console.WriteLine(i1);
            Console.WriteLine(a);
            i1 = i2.GetValueOrDefault();
            Console.WriteLine(i1);
            //Nullable types are used for storing information, which is not mandatory. For example, if we want to store data for a student such as the first name and last name as mandatory and age as not required, we can use type int? for the age variable: 
            */
            
            // String literals, literals are basically correct ways of displaying certain things and the correct syntax to certain things ex. 
            // normally if we wanna write "" in a sentence it would just kinda be like couting but if u do this: 
            string quotation = "\"Hello girl whats up\", he said";
            Console.WriteLine(quotation); // and thats how it works. 
            
            bool isMale = false; 
            Console.WriteLine ("Is anika male? " +isMale);
            string hi = "hello";// declaireing 
            string wo = "world";
            object wow = (hi + " " + wo);
            Console.WriteLine(wow); // concatenating two string in one object.
            //initializing and declare. 
            /*string we = "wee"; 
            we = (string)5;
            string secondstring; 
            secondstring = we; 
            
            Console.WriteLine(secondstring);*/
           string f; 
           wow = (object);
           f = wow; 
           
        
            
            
             
            
            
            
            
            
            
            
            
            
            
            
         
                
            
            
           
            
            
            
        }
    }
}


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