Batch variable equations

Question

1.00/5 (1 vote)

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I need help with subtracting or adding with variables kind of like this
@echo off
set var=5
echo %var%
pause
echo ___________________________________________
set /a %var% +1
echo %var%
Pause
Can you help me?

Posted 6-Nov-12 11:22am

G4mm4R4y

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Sergey Alexandrovich Kryukov 6-Nov-12 17:43pm

Why? do you mean arithmetic subtraction, or what?
--SA

G4mm4R4y 12-Nov-12 22:51pm

Well it solved but yes arithmetic I'm almost finished with my RPG that I needed this for but i have another question open holding another problem. Please help me with it if you can.

Sergey Alexandrovich Kryukov 12-Nov-12 23:00pm

Well, I will, if I can. Where is that question?
In the meanwhile, I provided a reference to a very useful batch which you can use to learn batch programming or get reference information. Please see my answer; hope it will help you.
--SA

G4mm4R4y 12-Nov-12 23:16pm

Here is the article i posted and ill check out that website. Thanks!
http://www.codeproject.com/Questions/492898/Windowsplusbatchplusclosesplusonpluswrongplusvaria

Sergey Alexandrovich Kryukov 12-Nov-12 23:42pm

I already answered, please see.
--SA

2 solutions

Solution 2

In addition to a correct answer by Alan N:

This wonderful batch script by Rob van der Woude, http://www.robvanderwoude.com[^], with improvements by Johan Parlevliet build a complete help on all batch commands on your system:
http://www.robvanderwoude.com/allhelp.php[^],
http://www.robvanderwoude.com/files/allhelp_nt.txt[^].

Good luck,

—SA

Posted 12-Nov-12 16:59pm

Sergey Alexandrovich Kryukov

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Alan N · Accepted Answer · 2012-11-06T15:14:00

Solution 1

Probably, I'm guessing at the problem but I assume "it doesn't work".
Try this

CSS

@echo off

echo Testing Set /P and Set /A
set /p NUM1=Enter a number :
set /p NUM2=Enter another number :

set /a RESULT=NUM1+NUM2
echo %NUM1% + %NUM2% = %RESULT%

REM your stuff corrected
set var=5
echo %var%
set /a var=var+1
echo %var%

pause

Posted 6-Nov-12 15:14pm

Alan N

Comments

Sergey Alexandrovich Kryukov 12-Nov-12 22:55pm

My 5. The key here is '/a' in 'set', arithmetic operation...
--SA