Перенос строки в командной строке windows

After a sleepless night and after reading all answers herein, after reading a lot of SS64 > CMD and after a lot of try & error I found:

The (almost) Ultimate Solution

TL;DR

… for early adopters.

Set Newline Environment Variable …

… in the Current CMD Session

:: Sets newline variables in the current CMD session
set n=​^&echo:
set nl=​^&echo:

… for the Current User

:: Sets newline variables for the current user [HKEY_CURRENT_USEREnvironment]
setx n ​^&echo:
setx nl ​^&echo:

… for the Local Machine

:: Sets newline variables for the local machine [HKEY_LOCAL_MACHINESYSTEMCurrentControlSetControlSession ManagerEnvironment]
setx n ​^&echo: /m 
setx nl ​^&echo: /m 

Why just almost?

It does not work with double-quotes that are not paired (opened and closed) in the same printed line, except if the only unpaired double-quote is the last character of the text, e.g.:

• works: ""echo %n%...after "newline". Before "newline"...%n%...after "newline" (paired in each printed line)

• works: echo %n%...after newline. Before newline...%n%...after newline" (the only unpaired double-quote is the last character)

• doesn’t work: echo "%n%...after newline. Before newline...%n%...after newline" (double-quotes are not paired in the same printed line)

  Workaround for completely double-quoted texts (inspired by Windows batch: echo without new line):

  set BEGIN_QUOTE=echo ^| set /p !="""
  ...
  %BEGIN_QUOTE%
  echo %n%...after newline. Before newline...%n%...after newline"
  

It works with completely single-quoted texts like:

echo '%n%...after newline. Before newline...%n%...after newline'

Added value: Escape Character

:: Escape character - useful for color codes when 'echo'ing
:: See https://learn.microsoft.com/en-us/windows/console/console-virtual-terminal-sequences#text-formatting
set ESC=

For the colors see also https://imgur.com/a/EuNXEar and https://gist.github.com/gerib/f2562474e7ca0d3cda600366ee4b8a45.

2nd added value: Getting Unicode characters easily

A great page for getting 87,461 Unicode characters (AToW) by keyword(s): https://www.amp-what.com/.

The Reasons

• The version in Ken’s answer works apparently (I didn’t try it), but is somehow…well…you see:

  set NLM=^
  
  
  set NL=^^^%NLM%%NLM%^%NLM%%NLM%
  

• The version derived from user2605194’s and user287293’s answer (without anything between ‘=‘ and ‘^‘):

  set nl=^&echo:
  set n=^&echo:
  

  works partly but fails with the variable at the beginning of the line to be echoed:

  > echo %n%Hello%n%World!
  echo   & echo:Hello & echo:World!
  echo is ON.
  Hello
  World
  

  due to the blank argument to the first echo.

• All others are more or less invoking three echos explicitely.

• I like short one-liners.

The Story Behind

To prevent set n=^&echo: suggested in answers herein echoing blank (and such printing its status) I first remembered the Alt+255 user from the times when Novell was a widely used network and code pages like 437 and 850 were used. But 0d255/0xFF is ›Ÿ‹ (Latin Small Letter Y with diaeresis) in Unicode nowadays.

Then I remembered that there are more spaces in Unicode than the ordinary 0d32/0x20 but all of them are considered whitespaces and lead to the same behaviour as ›␣‹.

But there are even more: the zero width spaces and joiners which are not considered as whitespaces. The problem with them is, that you cannot C&P them since with their zero width there’s nothing to select. So, I copied one that is close to one of them, the hair space (U+200A) which is right before the zero width space (U+200B) into Notepad++, opened its Hex-Editor plugin, found its bit representation E2 80 8A and changed it to E2 80 8B. Success! I had a non-whitespace character that’s not visible in my n environment variable.

It can be solved with a single echo.

You need a newline character n for this.
There are multiple ways to get a new line into the echo

1) This sample use the multiline caret to add a newline into the command,
the empty line is required

echo Hello^

world

2) The next solution creates first a variable which contains one single line feed character.

set n=^


rem ** Two empty lines are required

Or create the new line with a slightly modified version

(set n=^
%=DONT REMOVE THIS=%
)

And use this character with delayed expansion

setlocal EnableDelayedExpansion
echo Hello!n!world

To use a line feed character with the percent expansion you need to create a more complex sequence

echo Hello^%n%%n%world

Or you can use the New line hack

REM Creating a Newline variable (the two blank lines are required!)
set n=^


set NL=^^^%n%%n%^%n%%n%
REM Example Usage:
echo There should be a newline%NL%inserted here.

But only the delayed expansion of the newline works reliable, also inside of quotes.

It can be solved with a single echo.

You need a newline character n for this.
There are multiple ways to get a new line into the echo

1) This sample use the multiline caret to add a newline into the command,
the empty line is required

echo Hello^

world

2) The next solution creates first a variable which contains one single line feed character.

set n=^


rem ** Two empty lines are required

Or create the new line with a slightly modified version

(set n=^
%=DONT REMOVE THIS=%
)

And use this character with delayed expansion

setlocal EnableDelayedExpansion
echo Hello!n!world

To use a line feed character with the percent expansion you need to create a more complex sequence

echo Hello^%n%%n%world

Or you can use the New line hack

REM Creating a Newline variable (the two blank lines are required!)
set n=^


set NL=^^^%n%%n%^%n%%n%
REM Example Usage:
echo There should be a newline%NL%inserted here.

But only the delayed expansion of the newline works reliable, also inside of quotes.