Reduce decimals in var

Setup, Configuration and Use Beginners
1

I have an item:
Number ElectricalCost2 “Electrical cost [%.2f Kr]”

In a rule I put the value in a var that I mail
var doorbellmessage = “El Konsumption=”+ ElectricalCost2.state as DecimalType
sendMail(“xxxx@hotmail.com”, “Dagens Energi Kostnad”, doorbellmessage, attachmentUrlList)

This works fine, but in the recieved mail i got to many decimals
El Konsumption=37.3544887500Kr

How can I reduce the number of decimals to 2 in the var/mail?

2

Try this:

var doorbellmessage = String.format("El Konsumption=%.2f Kr", ElectricalCost2.state as DecimalType)
3

It did not work, I got the error message:

Rule ‘Reset Cost 2’: f != org.eclipse.smarthome.core.library.types.DecimalType

4

Try
(ElectricalCost2.state as DecimalType).floatValue

5

Thanks, it worked

[quote=“String.format(“El Konsumption=%.2f Kr”, (ElectricalCost2.state as DecimalType).floatValue)”]