Scoring in a dynamic text field

So i have a game and i do not know how to make a text box display the score. I have a dynamic text box with an instance name and i can set the field to display text but i don’t know how to make the numerical value of the text change dynamically. I can do it in 1.0, but 3.0 is different.

So to make this a little easier, how would you make a button add 1 to a textfield each time you click on the button?

Tons of thanks!