Help! I've gone brain dead

[Mark Fenton]

and can't recall how to increment a variable in shell!

I want to do something like:

VAR=1
for blah blah blah
do
VAR=$VAR+1
echo $VAR > somewhere
do some other stuff
done
((is today Monday again?))

[S.K. Chan]

((VAR+=1))

[Mark Greene_1 · Accepted solution]

try this:

VAR=1
(( VAR = $VAR + 1 ))
echo $VAR


HTH
mark

[harry d brown jr]

Mark,

To be brain dead, you have to be in management!

live free or die
harry

[Helen French]

Mark,

Yes ..I agree with Harry ! So visit the admin (prefer HP-UX admin) session some times !

Shiju

[Darrell Allen]

Hi Mark,

Another method:
VAR=`expr $VAR + 1`

Sounds like Harry and Shiju have had some of the same managers I've had! Ya'll didn't use to work at...

Well, better left unsaid!

Darrell

[James R. Ferguson]

Hi Mark:

In keeping with more-than-one-way:

# let X=X+1

Regards!

...JRF...

[Mark Fenton]

Thanks all.

Harry -- I have to apologize -- if I had thought about it, the chuckle should have been worth at least 10.

All others, thanks for breathing life back into a frazzled admin......

This forum is great.