Concatenate string and number in batch file

Question

How to concatenate number and string in for loop? I've tried like this but it doesn't work:

SET PATH=C:\file
FOR /L %%x IN (1,1,5) DO (
    SET "NUM=0%%x"
    SET VAR=%PATH%%NUM%
    ECHO %VAR%
)

Answer 1

Modify your code like this:

@ECHO OFF
SETLOCAL ENABLEDELAYEDEXPANSION
SET PATH=C:\file
FOR /L %%x IN (1,1,5) DO (
    SET "NUM=0%%x"
    SET VAR=%PATH%!NUM!
    ECHO !VAR!
)

You always have to use SETLOCAL ENABLEDELAYEDEXPANSION and !...! instead of %...% when working with variables which are modified inside a loop.