Find the area and perimeter of circle.

Declare
	pi constant number(3,2) := 3.14;
	radius number(7);
	area number(13,2);
	perimeter number(13,2);
Begin
	radius := &n;
	perimeter:=2*pi*radius;
	area := pi* power(radius,2);
DBMS_OUTPUT.PUT_LINE('Area'||area||' '||'perimeter'||perimeter);
end;