I'm having trouble finding documentation of surrounding a variable with plus signs and what it does

I’m having trouble finding documentation of surrounding a variable with plus signs and what it does. In Lesson 6, Part 3: Dynamic Selectors, we use +digit+ to provide a dynamic value for selecting a button in the calculator. What do these plus signs do specifically?

Also, is this specific to Selectors? Or do we surround certain types of data with plus signs in other scenarios?

Thanks!

It is used to combine pieces of strings, like this:
“TEXT1” + variableA + “TEXT2”
Lets say variableA = " TEXT 3", then the result would be:
“TEXT1 TEXT3 TEXT2”

Thank you! Idk why it didn’t click until now, I initially thought it was a way to indicate to UIPath that the GenericValue you were entering in was an Int32. Thank you!

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