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Form Validation in Flutter

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Form validation is required for all applications. There exist alternative methods for validating forms within a Flutter application, such as employing a TextEditingController. However, in large systems, it might become complex to manage text controllers for every input. Thus, Form provides us with a useful way to confirm user inputs.

While the example below applies the condition to each TextFormField using a widget name validator, the input is validated in your submit function—the function that runs after the user fills out all the fields.

Example:

Output:


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