title: How add a a number to a variable in batch
body: <p>Hey I'm working on a project of mine in batch. yes I know its bad but I'm using it anyways. I was trying to make an updating inventory system when I ran into this problem. I was trying to add a set number E.X 1 to a variable like this:</p>
  
  <pre><code>@echo off
  set var=0
  echo I will add these numbers from var+1
  set /a var=%var%+1
  pause
  echo var
  pause
  </code></pre>
  
  <p>what is the problem?</p>