C# - Nullable Type

[@TutorialsPoint_]

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[@omkar1o]

Hi i am using Visual Studio 2019 and i need to write console.writeline alway. Which you are not doing . can you please tell me is it just difference of IDE or system library.
for exmple
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace Tutorials_Point
{
class Program
{
static void Main(string[] args)
{
string a = null;
int? b = null;
object c = null;
int v = b ?? 20;
int? d = v;
Console.WriteLine(d);
Console.ReadLine();
}
}
}

[@akmalpathan1]

thank you

[@amjedali82]

thank you so much

[@moksha6986]

Its very bad practice to have variable names a,b,s . Here scope of variables is small but still this course is for beginners and they must practice descriptive names since beginning , or gunna endup like what you doing in this program