BATCH SET unable to use divide operator

batch batch-file

5,934

This can happen if your extenstions are disabled. You can check setlocal /? and cmd /? for more information about extensions.

But the set /? specifies:

If Command Extensions are enabled SET changes as follows:  
...
Two new switches have been added to the SET command:  
  SET /A expression  
  SET /P variable=[promptString]

So without extensions the /A does not work.

You can add the setlocal-line to the top of your batchfile:

setlocal enableextensions enabledelayedexpansion
SET /A 216/18
SET /A div=216/18
ECHO %div%

5,934

Gen1n

A render wrangler in an animation company based in India, trying to hone my skills in programming. Update: Associate Innovator in an Australian based consulting company.

Updated on September 18, 2022

Comments

Gen1n over 1 year

I am unable to divide using the divide operator provided in the SET command.

SET /A 216/18

SET /A div=216/18

ECHO %div%

Though this should work and it does in the command prompt window but when used through a batch script it gives a blank output.

like

ECHO is on.

Whats wrong?
- Christian over 10 years
  
  What means blank? For me, the script works.
- Christian over 10 years
  
  Have you added a "Pause"? I have written the code in notepad++ and it works as bat-script.
- martineau over 10 years
  
  Works for me in a command prompt window.
- BillR over 10 years
  
  File testbat.bat CD C:\DeleteLater SET /A Div=216/3 ECHO /3 %Div% >> testbat.txt File testbat.txt /3 72
- BillR over 10 years
  
  Substitute SET Div >> testbat.txt yields Div=72 in testbat.txt
- Gen1n over 10 years
  
  UPDATE: It works in my friend's PC as well but as soon as I import the same script to my computer and run it, it doesn't work. We both share the same version of Windows and almost same config but it shouldn't matter.