Consider

the following code:

CREATE
OR REPLACE FUNCTION calculate_grade (
    p_marks IN NUMBER
)
RETURN VARCHAR2 IS
    v_grade VARCHAR2(2);
BEGIN
    IF p_marks >= 90 THEN
        v_grade := 'A';
    ELSIF p_marks >= 75 THEN
        v_grade := 'B';
    ELSIF p_marks >= 60 THEN
        v_grade := 'C';
    ELSE
        v_grade := 'F';
    END IF;
 
    RETURN v_grade;
END;
/
And
also: 
 
DECLARE
    v_result VARCHAR2(2);
BEGIN
    v_result := calculate_grade(82);
    DBMS_OUTPUT.put_line('Student Grade = ' || v_result);
END;
/

Question: What will be the output of the PL/SQL block above when calculate_grade(82) is executed