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AtomicKotlinCourse/Introduction to Objects/Constraining Visibility/Exercise 4/task.md

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Mastering the IDE: Extend Selection

When you apply refactorings like Extract Property, you must select the expression that you'd like to extract. This expression might be quite complicated.

The Extend Selection action accessed using the &shortcut:EditorSelectWord; shortcut is very helpful here: it selects the outside expression, increasing the selection by each step. The reverse action is called Shrink selection and is accessible by &shortcut:EditorUnSelectWord;.

Put the caret on the line println("Incorrect input: $x should be positive") and extend and shrink the selection to see how it works. Continue to extend the selection until the whole file is selected.