How to retrieve the value of a text field in flutter

In this article, you will learn How to retrieve the value of a text field in flutter which a user has entered into a text field:

After supplying the TextEditingController to the text field, begin reading values. Use the text() method provided by the TextEditingController to retrieve the String that the user has entered into the text field.

The following code displays an alert dialog with the current value of the text field when the user taps a floating action button.

Here is an interactive example:

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