On Thursday, 24 August 2017 at 11:07:16 UTC, Suliman wrote:
> All modern languages like Dart and C# have string interpolation. Sharp example:
>
> Console.WriteLine($"Hello {args[0]}!");
>
> Who can summary is there any objective reasons why it's not realized in D?

No one has submitted a DIP for that feature and no one has tried to implement it. You could be the first one :P

On Thursday, 24 August 2017 at 11:07:16 UTC, Suliman wrote:
> All modern languages like Dart and C# have string interpolation. Sharp example:
>
> Console.WriteLine($"Hello {args[0]}!");
>
> Who can summary is there any objective reasons why it's not realized in D?

As Raymond Chen once said[1], because no one implemented it.

That certainly is part of the answer. If you want other "objective" reasons, there basically are none. It's technically possible to implement, but D devs haven't found it necessary or to their liking.

Plenty of reasons for not implementing it have been given in this thread. You may disagree, in which case I encourage you to write a DIP and implement it.

--
  Biotronic

[1] https://blogs.technet.microsoft.com/seanearp/2007/04/12/why-doesnt-this-feature-exist/

On Thursday, 24 August 2017 at 11:07:16 UTC, Suliman wrote:
> All modern languages like Dart and C# have string interpolation. Sharp example:
>
> Console.WriteLine($"Hello {args[0]}!");
>
> Who can summary is there any objective reasons why it's not realized in D?

Maybe you ought to read this entire thread?

On Thursday, 24 August 2017 at 11:57:59 UTC, Petar Kirov [ZombineDev] wrote:
> On Thursday, 24 August 2017 at 11:07:16 UTC, Suliman wrote:
>> All modern languages like Dart and C# have string interpolation. Sharp example:
>>
>> Console.WriteLine($"Hello {args[0]}!");
>>
>> Who can summary is there any objective reasons why it's not realized in D?
>
> No one has submitted a DIP for that feature and no one has tried to implement it. You could be the first one :P

FYI there has been an attempt:
https://github.com/dlang/dmd/pull/6703

But I think this is more an issue of how the language should allow it then on the implementation itself.