what is difference between retesting and regression testing

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Retesting is testing the same functionality again to ensure the defect is fixed, while regression testing is testing the whole application to ensure new changes do not affect existing functionality.

Retesting focuses on verifying that a specific defect has been fixed.
Regression testing focuses on ensuring that new changes do not impact existing functionality.
Retesting is usually performed by the tester who found the defect.
Regression testing is typically performed by the testing team as a whole.
Example: Retesting would involve testing a login functionality after a bug fix, while regression testing would involve testing the entire application after a new feature is added.

what is difference between retesting and regression testing

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