************************************Exercise 1**********************************BEGIN

DECLARE

credit_limit CONSTANT NUMBER(4) := 50000;

BEGIN

NULL;

END;

EXCEPTION

WHEN VALUE_ERROR THENDBMS_OUTPUT.PUT_LINE('Exception raised in declaration');

END;/

************************************Exercise 2**********************************DECLARE

num1 NUMBER :=100;

num2 NUMBER :=0;

num3 NUMBER := num1/num2;

BEGIN

NULL;

EXCEPTION

WHEN ZERO_DIVIDE THENDBMS_OUTPUT.PUT_LINE('Exception of divide by zero');

END;/

************************************Exercise 3**********************************

DECLAREnum NUMBER :=100;

n NUMBER := 0;

reslt NUMBER;

BEGIN

BEGIN

reslt:=num/n; --raises zero_divide exception

DBMS_OUTPUT.PUT_LINE('Result of division is '||reslt);

EXCEPTION

WHEN ZERO_DIVIDE THEN

DBMS_OUTPUT.PUT_LINE('Exception handled in inner block,division by zero'); RAISE;

END;

EXCEPTION

WHEN ZERO_DIVIDE THEN

DBMS_OUTPUT.PUT_LINE('Exception handled in enclosing block,division by zero');

END;/

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