How to concatenate strings in a Windows batch file

Question

I have a directory for which I want to list all the  doc files with a     I know the following batch command echos all the files   for  r   i In    doc  DO echo   i   But now I want to put them all in a variable  add a   in between and echo them all at once  How can I do that   set myvar  the list    for  r   i In    doc  DO  lt what  gt  echo  myvar

User · Accepted Answer

What about    echo off set myvar  the list    for  r   i in    doc  DO call  concat   i echo  myvar  goto  eof   concat set myvar  myvar   1  goto  eof

User · Answer

Based on Rubens  solution  you need to enable Delayed Expansion of env variables  type  help setlocal  or  help cmd   so that the var is correctly evaluated in the loop    echo off setlocal enabledelayedexpansion set myvar the list   for  r   i In    sql  DO set myvar  myvar    i  echo  myvar    Also consider the following restriction  MSDN       The maximum individual environment   variable size is 8192bytes

User · Answer

Note that the variables  fname or  ext can be simply concatenated  This   forfiles  S  M   pdf  C  CMD  C REN  path  fname old  ext    renames all PDF files to  filename old pdf

[windows] How to concatenate strings in a Windows batch file?

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