How do I define a specific number in a blueprint variable and then in another blueprint take this value and display it in a textbox?

Development Getting Started & Setup
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How do I define a specific number in a blueprint variable and then in another blueprint take this value and display it in a textbox?

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Blueprints are classes. You can’t “read the value from a blueprint.” You can “read the value from an object.” Blueprints can be used to create objects.

So, if you have spawned an actor from a blueprint, find that actor in some way (through collision/triggering, through get-objects-by-class, or some other mechanism) and then read the value from that actor, just like you’d read a value from any other actor.

If you don’t actually want to create instances of the class, the Blueprint is the wrong tool. You probably instead want a “simple data asset” which you can then create instances of, and reference as object refenreces.
You could also create a data table, with some struct that defines the properties of each row on the table, and then use some key field (a name, a value, …) as the lookup key in that data table.

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Maybe you can start learn the basic way to blueprint communication

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I have workaround for global variables:

  • create blueprint function library (it is in dropdown menu under blueprints)
  • create function that returns your value from variable
  • declare local variable to that function, set its default value to what you need.
  • make that function PURE

Now you have little node that always returns value you want.

You can get it step further:

  • create function that returns you Game Mode reference
  • there create “global constant variables” (I know silly name), now you can have all const in single place.
  • modify first function to find game mode reference and read that variable from it

And you can go even further (what is i am doing):

  • use C++
  • create pure blueprintable function that returns value, benefit to this is that C++ will not randomly zero variable (like bp`s do sometimes) and you can have all constant values in declaration as TEXT, then function just returns it to bps