List of string variable in azure devops pipeline

I’m creating a simple pipeline to deploy my test azure functions, I can’t figure out why my list of strings in the variable throws this error:

A sequence was not expected

Below is the code that generates the error.

trigger:
- none

variables:
  functionNames:       
    - 'Function1'
    - 'Function2'

stages:
- template: ../Stage/build-stage.yml
  parameters:
    functionNames: $( functionNames )

I tried to review the formatting, location, name but nothing as if it doesn’t want to work.

>Solution :

Azure Pipelines only supports "string" variables, no arrays or lists.

You can split the text on a delimiter or parse it as json to get something that resembles what you want.