Batch - edit specified line in text file

Question

For example, line number 2 reads: \"0\" (without quotes). I want to change that 0 to a 1, without changing anything else in the text file.

I know what line the value

Answer 1

try this:

@ECHO OFF &SETLOCAL
SET "file=file"
SET /a Line#ToSearch=2
SET "Replacement=0"

(FOR /f "tokens=1*delims=:" %%a IN ('findstr /n "^" "%file%"') DO (
    SET "Line=%%b"
    IF %%a equ %Line#ToSearch% SET "Line=%Replacement%"
    SETLOCAL ENABLEDELAYEDEXPANSION
    ECHO(!Line!
    ENDLOCAL
))>"%file%.new"
TYPE "%file%.new"

Note: this doen't work properly for lines starting with colons :, this might be fixed if needed.