写成如下:
declare
j number:=0;
begin
dbms_output.enable;
for j in 1..20 loop
if (mod(j,2)=0) then
dbms_output.put_line(to_char(j)||' '||'是偶数呀!!');
end if;
end loop;
end;
/
declare
j number:=0;
begin
dbms_output.enable;
for j in 1..20 loop
if (mod(j,2)=0) then
dbms_output.put_line(to_char(j)||' '||'是偶数呀!!');
end if;
end loop;
end;
/
2 j number:=0;
3 begin
4 dbms_output.enable;
5 for j in 1..20 loop
6 if (mod(j,2)=1) then
7 goto line;
8 end if;
9 dbms_output.put_line(to_char(j)||' '||'是偶数呀!!');
10 <<line>>
null;
11 end loop;
12 end;
13 /