Batch: For loop parameter using variables

Question

I want to create a for loop that uses user input variables in it's parameter. Here is what I have:

@ECHO off
DEL "./positions.txt"
SET /P start_position= Please enter the start position:
SET /P end_position= Please enter the end position:
SET /P step_size= Please enter the step size:
FOR /L %%A IN (%start_position%,%end_position%,%step_size%) DO (
    ECHO %%A >> positions.txt
)
ECHO( & echo.Done! "positions.txt" was generated. & echo.
pause

However this doesn't seem to work. Here is what I get on the output:

>> Done! "positions.txt" was generated.

It runs, but skips over the for loop. What is wrong?

SomethingDark · Accepted Answer · 2017-06-07 19:30:37Z

3

for /L loops use the order start, step, end.

FOR /L %%A IN (%start_position%,%step_size%,%end_position%) DO (
    ECHO %%A >> positions.txt
)

answered Jun 7, 2017 at 19:30

SomethingDark

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1 Comment

Invisible Hippo Over a year ago

Thank you very much! I still have C programming stuck in my head.

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