How to create a variable that gets + 1 or - 1 according to clicks?

I don't know what to look for.  Is there a way to define an invisible flash variable so as to keep the score?

The best way I can describe it comes from the BASE language I used to use back in the day, where you can click on x = x + 1 or x = x-3, or what function of the button click you.  And then it would display the score (i.e., just what is the current value of x) in the corner?

I guess the simplest way that could help me to give me a link or the actual code you EF to a single button that will add or subtract a score displayed in the corner.

My knowledge of ActionScript is very limited... I know that what I have copy - paste for my purposes of line.

Thank you!

However, whenever you plan to display the value you can use...

textFieldName.text = String (someVariable);

where textFieldName is any instance name assign you to the TextField object

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