MAKEMSI quickly and reliably creates MSI files in a non-programmatic way\Tips and TricksBatch FilesBatch File Tips and TricksDelayed Expansion (in loops)

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Delayed Expansion (in loops)

Delayed expansion is typically not something you'd want to do but something forced on you by the batch language, specifically in how bracketed loops are implemented...

The "ENABLEDELAYEDEXPANSION" bit is required by "Method 1" in the following:

@echo off
SetLocal ENABLEDELAYEDEXPANSION

echo.
echo **** METHOD 1 (needs "ENABLEDELAYEDEXPANSION") *****
set VAR=!!!!!!!!
for /L %%i in (1,1,10) do (
    set VAR=%%i - WORKED
    echo %%i : !VAR!
)

echo.
echo **** METHOD 2 *****
set VAR=!!!!!!!!
for /L %%i in (1,1,10) do call :Loop1 %%i
    goto Next-Loop1
    :Loop1
    set VAR=%1 - WORKED
    echo %1 : %VAR%
    goto :EOF
:Next-Loop1

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