plpgsql - PostgreSQL GOTO like keyword to jump to a block

Question

I have a PostgreSQL function

CREATE OR REPLACE FUNCTION increment(i integer) RETURNS integer AS $$
BEGIN
IF i<0 THEN 
RETURN i + 1;
ELSE
  GOTO label1;
END IF
<<label1>>
RETURN null;
END;
$$ LANGUAGE plpgsql;

In this function I have to GOTO to a label1, but GOTO keyword is not working, can u please help me in getting the way from which I am able to jump from a particular code to label.

Answer 1

Another nested Begin block?

BEGIN
  <<label1>>
  BEGIN 
      IF i<0 THEN 
          RETURN i + 1;
      ELSE
          EXIT label1;
      END IF;
  END;
  RETURN null;
END;