How to echo double quote into file without new line in Batch?

Question

I want to write " sign using Batch in the file.

echo| set /p=""" >> abc.txt

This doesn't work as intended because it gives errors sending data to my file.

Any ideas?

Answer 1

Your idea "three quotes" idea wasn't bad. But due to impaired quotes, the parser doesn't process it right. You have to escape one of them (one of the outer ones - escaping the middle one doesn't work):

<nul set /p =^""" >> abc.txt

or

<nul set /p =""^" >> abc.txt

this describes in detail, how cmd does parsing.

Also I changed echo| set /p... with <nul set /p, which is much faster. Piping generates two new cmd processes, because each side of the pipe is run in a separate process, which costs time.

Answer 2

This should give you the desired result for adding single, double-quote ":

echo| set /p=^""^">>abc.txt

Where this will give a result of double, double-quote ""

echo| set /p=^"""^">>abc.txt

To break it down, we escape the opening and closing quotations ^" with the desired result inbetween, these examples shows the desired results in parenthesis, with the escaped " outside of the parenthesis ^"(")^" or ^"("")^"

In short, no matter how many double quotes you want inbetween, as long as the opening and closing double-quotes are escaped.

So using the parenthesized examples as above, if you actually do:

echo echo| set /p=^"(")^"

it will only return the result of (")

Note the parsing is different when using echo| compared to @stephan's solution using <nul as pipe will initiate a second process and <nul does not.