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If a label is declared but not used in the program, it can be considered as dead code and should therefore be removed.
This will improve maintainability as developers will not wonder what this label is used for.
Noncompliant Code Example

&lt;&lt;foo&gt;&gt; -- Non-Compliant
BEGIN
  DBMS_OUTPUT.PUT_LINE('Hello, world!');
END;

Compliant Solution

-- Compliant
BEGIN
  DBMS_OUTPUT.PUT_LINE('Hello, world!');
END;

See


 MISRA C:2012, 2.6 - A function should not contain unused label declarations