Leading Zeros for Facility ID in Feature Class using Attribute Rules and Arcade

[AnnaPeters]

Hello,

I am trying to generate Facility IDs for my Water Meter feature class in ArcGIS Pro using Attribute Rules. This is the code I have so far, but I need to figure out how to add leading zeros, or decimal places to the ID. What I come up with is "wMET3" and I would like "wMET003".  Any insight would be greatly appreciated. 

if(isempty($feature.FACILITYID)) return concatenate("wMET" + nextsequencevalue("wMeterSeq"));

[jcarlson]

Put your sequence value into the Text function. In the format parameter, a '0' is a mandatory digit, which will appear as a leading zero if the sequence is not that high yet.

var seq_num = 3

return 'Meter' + Text(seq_num, '0000')

Returns:

'Meter0003'

[LanceCole · Accepted solution]

I have not worked with this in Pro Attribute Rules but the Concatenate function in Arcade is Concatenate( values, separator?, format? ).  Try using the following in your return:

Concatenate(['wMET', nextsequencevalue("wMeterSeq")], '', '000')

[jcarlson]

I'm so used to concatenating w/ a "+" I completely forgot about that. Nice!

[AnnaPeters]

Both of these processes worked. Thanks so much!