Define labels using a function?

Question

When you create a label in VBScript or python you can create a function (using the advance checkbox).

This does not exists for Arcade why?

The simple example is that I have an integer field.

If its value is above 100 I want my label to say "high"

If it is between 100 to 50 I want "medium" and if less then 50 I need "low"

How do I create such a label in Arcade.

danretired · Accepted Answer

Specify text for labels—ArcGIS Pro | Documentation

A label expression can either be a simple single line expression, or a more complex expression spanning multiple lines of code and making use of the parser's programming logic. Arcade enables complex expressions by default. When using Python, VBScript, or JScript, the Advanced checkbox must be checked and the code must be wrapped in a function to enable multi-line expressions.

It suggests to me that a function isn't needed by default, but is for the others.  Interesting difference if that is the case