How to loop over environment variables in windows batch file? [duplicate]

问题

This question already has answers here:

Arrays, linked lists and other data structures in cmd.exe (batch) script (10 answers)

Closed 12 days ago.

In windows, I want to loop over a set of environment variables like in this pseudo code:

set MYVAR1=test
set MYVAR2=4711
set MYVAR3="a b c"

for /l %%x in (1, 1, 3) do (
   echo %MYVAR%s%%
)

for which I expect the following output

test
4711
a b c 

How to change this example code to get it to work?

回答1:

@echo off
set MYVAR1=test
set MYVAR2=4711
set MYVAR3="a b c"

setlocal enableDelayedExpansion
for /l %%x in (1, 1, 3) do (
   echo !MYVAR%%x!
)
endlocal

回答2:

One more way, parse the output of set command using the variable prefix

@echo off
    setlocal enableextensions disabledelayedexpansion

    set MYVAR1=test
    set MYVAR2=4711
    set MYVAR3="a b c"

    for /f "tokens=1,* delims==" %%a in ('set MYVAR') do echo %%b

回答3:

Another method:

@echo off
set MYVAR1=test
set MYVAR2=4711
set MYVAR3="a b c"

for /l %%x in (1, 1, 3) do (
   call echo %%MYVAR%%x%%
)
pause

来源：https://stackoverflow.com/questions/24909055/how-to-loop-over-environment-variables-in-windows-batch-file