--利用loop输出1到100的值并求和
---loop exit end loop
set serveroutput on;
declare
v_i integer:=1;
v_sum integer:=0;
begin
loop
if(v_i>100)then
exit;
end if;
DBMS_OUTPUT.PUT_LINE(v_i);
v_sum:=v_sum+v_i;
v_i:=v_i+1;
end loop;
DBMS_OUTPUT.PUT_LINE(‘sum is‘||v_sum);
end;
-----------------
--loop 代码 exit when 条件; end loop

declare 
v_i integer :=1;
v_sum integer:=0;
begin
 loop
 exit when v_i>100;
 v_sum :=v_sum+v_i;
 v_i:=v_i+1;
 end loop;
 DBMS_OUTPUT.PUT_LINE(‘sun is‘||v_sum);
 end;
---while 条件 loop 代码 end loop
declare 
v_i integer :=1;
v_sum integer:=0;
begin
while v_i<=100 
loop
 v_sum :=v_sum+v_i;
 v_i:=v_i+1;
 end loop;
 DBMS_OUTPUT.PUT_LINE(‘sun is‘||v_sum);
 end;
--for in...

declare 
v_s integer:=0;
begin
for i in 1..100 loop
v_s:=v_s+i;
end loop;
DBMS_OUTPUT.PUT_LINE(v_s);
end;