# How do you evaluate if there is 2 discs or not I'm under Rename?
**URL:** https://community.mp3tag.de/t/how-do-you-evaluate-if-there-is-2-discs-or-not-im-under-rename/18054
**Category:** Support
**Created:** [June 21, 2016, 11:11pm UTC](https://community.mp3tag.de/t/how-do-you-evaluate-if-there-is-2-discs-or-not-im-under-rename/18054 "2016-06-21T23:11:39Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@DevXen](https://community.mp3tag.de/u/DevXen)
#### Post date: [June 21, 2016, 11:11pm UTC](https://community.mp3tag.de/t/how-do-you-evaluate-if-there-is-2-discs-or-not-im-under-rename/18054/1 "2016-06-21T23:11:39Z")
I have an action to rename mp3s. And I am not sure how to evaluate if the %discnumber% tag. Is empty, or has greater than 1.
So I can add: Disc 01, Disc 02, Disc 03, etc. But only if the second value in the tag is above 1. Like: 1/2 or 2/2 or 1/3, disc number/total discs
If that tag is empty I don't want it to add a disc number and if that tag is 1 or 1/1 I don't want it to add a disc number. I'm not sure how I would add that to an action rename script to go with the rest of host I have it renaming/organizing it.
---
### Author:  [@DetlevD](https://community.mp3tag.de/u/DetlevD)
#### Post date: [June 22, 2016, 5:02am UTC](https://community.mp3tag.de/t/how-do-you-evaluate-if-there-is-2-discs-or-not-im-under-rename/18054/2 "2016-06-22T05:02:36Z")
> [@DevXen](#):
>
> ... But only if the second value in the tag is above 1. Like: 1/2 or 2/2 or 1/3, disc number/total discs ...
As the first step you should isolate the total disc number from the compound disc number.
Action: Guess values
Source format: %discnumber%
Guessing pattern: %dummy%/%disctotal%
Now use the tagfield DISCTOTAL for the other calculations.
DD.20160622.0902.CEST
---
### Author:  [@ohrenkino](https://community.mp3tag.de/u/ohrenkino)
#### Post date: [June 22, 2016, 5:12am UTC](https://community.mp3tag.de/t/how-do-you-evaluate-if-there-is-2-discs-or-not-im-under-rename/18054/3 "2016-06-22T05:12:36Z")
> [@DevXen](#):
>
> I have an action to rename mp3s. And I am not sure how to evaluate if the %discnumber% tag. Is empty, or has greater than 1.
>
> So I can add: Disc 01, Disc 02, Disc 03, etc. But only if the second value in the tag is above 1. Like: 1/2 or 2/2 or 1/3, disc number/total discs
>
> If that tag is empty I don't want it to add a disc number and if that tag is 1 or 1/1 I don't want it to add a disc number. I'm not sure how I would add that to an action rename script to go with the rest of host I have it renaming/organizing it.
I would clear those discnumber fields first that apparently have no decent contents.
The square brackets in a format string serve as "if" operator.
So %album%[- %discnumber%]
would lead to
The Lamb lies down on broadway - 1
if %discnumber% is 1
and to
Abacab
if discnumber is not filled.
Perhaps this is what you are looking for.
---
### Author:  [@DevXen](https://community.mp3tag.de/u/DevXen)
#### Post date: [June 22, 2016, 12:53pm UTC](https://community.mp3tag.de/t/how-do-you-evaluate-if-there-is-2-discs-or-not-im-under-rename/18054/4 "2016-06-22T12:53:59Z")
> [@ohrenkino](#):
>
> I would clear those discnumber fields first that apparently have no decent contents.
>
> The square brackets in a format string serve as "if" operator.
> So %album%[- %discnumber%]
> would lead to
> The Lamb lies down on broadway - 1
> if %discnumber% is 1
> and to
> Abacab
> if discnumber is not filled.
>
> Perhaps this is what you are looking for.
Thanks to both of you, I actually was able to get it to work with this (In Case anyone else needs to get it working):
$if($grtr($right(%discnumber%,1),1),Disc 0$num(%discnumber%,1) - ,)
---
### Author:  [@system](https://community.mp3tag.de/u/system)
#### Post date: [February 9, 2026, 12:26pm UTC](https://community.mp3tag.de/t/how-do-you-evaluate-if-there-is-2-discs-or-not-im-under-rename/18054/5 "2026-02-09T12:26:18Z")