pl/sql

DECLARE
a number:=4;
b number:=2;
add number(10);
sub number(10);
mul number(10);
div number(10);
expo number(10);

BEGIN
add:=a+b;
sub:=a-b;
mul:=a*b;
div:=a/b;
expo:=a**b;
dbms_output.put_line('sum value is'|| add);
dbms_output.put_line('sub value is'|| sub);
dbms_output.put_line('mul value is'|| mul);
dbms_output.put_line('div value is'|| div);
dbms_output.put_line('expo value is'|| expo);

END;
/

---Output----

sum value is6
sub value is2
mul value is8
div value is2
expo value is16