which is the number of items in the inventory

Specifically, some investigation games (e.g., the Case of the Golden Idol) display how many clues you collected. This helps to give a sense of progress, especially if this value is shown as a fraction of the total number of clues that can be collected. In other words, I am looking for the value of nRecordedClues in "v=nRecordedClues>/20" (where 20 is the total number of clues).

Values["nRecordedClues"].Int = #game.CurrentCharacter.Items

I'm assuming you already know how to display the value in a display text/object text, etc? If not inside of the text you would write: <v=nRecordedClues>/20

You correctly assume that... I'm a newbie so I am stuck despite your answer

This is what I did but it doesn't work (i.e., the text shows '?'). In the inventory of the character 1 I created a 'called by other action' action:

2) the second line of the action is a Display text where the text is <v=nRecordedClues>

I am sure that I am doing something very silly (i.e., some errors in the syntax), but I can't find it...

Anyway, I really would recommend joining our Discord server if you aren't already on it. It's much easier & faster for getting & providing help than on here.