Running total in a DOS loop

I am having trouble creating a running total in a DOS loop.
this is what I have inside the loop:
     set total=%%H
     set /a tot=%total%+%%H
     echo. %tot%
total is initalized to zero
my results look like:
0+3987 ect.
Any help would be greatly appreciated.  Thanks.
Who is Participating?
oBdAConnect With a Mentor Commented:
You're a victim of variable expansion in a for loop; the interpreter reads the complete loop, expands all normal variables, and uses these values (enter "help set" for details).
You need to enable delayed expansion; in addition, there is no need to use percentage signs in a "set /a" command.
Compare the output of the following commands:
for /l %a in (1, 1, 10) do (set /a i = %i% + 1)

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for /l %a in (1, 1, 10) do (set /a j = j + 1)

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So try something like this (note the "!" being used to expand the "total" variable in the loop!):
@echo off
setlocal enabledelayedexpansion
set total=0
for /l %%H in (1, 1, 10) do (
     set /a total = total + %%H
     echo !total!

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Paolo SantiangeliConsulente InformaticoCommented:
Steve4400Author Commented:
Worked!  Thanks very much.
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