有没有办法退出单个循环,并退出所有循环?
Is there a way to exit a single loop, and exit all loops?
我有 2 个循环,一个内循环和一个外循环。在一种情况下,我只想退出内循环以转到外循环,而在另一种情况下,我想从内循环退出到正常程序(换句话说,我想从内循环退出,而外循环并继续执行 man 程序)
有谁知道我可以同时做到这两点的方法吗?
是的,这要归功于命名循环。示例:
Outer_Loop:
loop
-- first inner loop
loop
…
-- exit the inner loop when a condition is met
exit when Check_Condition();
…
end loop;
-- second inner loop
loop
…
-- exit the *outer* loop, in this example unconditionally
exit Outer_Loop;
-- or you can combine it with a condition
exit Outer_Loop when Another_Condition_Met();
…
end loop;
end loop Outer_Loop;
-- execution will continue here after 'exit Outer_Loop;'
…
可以找到参考资料(对于 '95 版本的语言)here。
我有 2 个循环,一个内循环和一个外循环。在一种情况下,我只想退出内循环以转到外循环,而在另一种情况下,我想从内循环退出到正常程序(换句话说,我想从内循环退出,而外循环并继续执行 man 程序)
有谁知道我可以同时做到这两点的方法吗?
是的,这要归功于命名循环。示例:
Outer_Loop:
loop
-- first inner loop
loop
…
-- exit the inner loop when a condition is met
exit when Check_Condition();
…
end loop;
-- second inner loop
loop
…
-- exit the *outer* loop, in this example unconditionally
exit Outer_Loop;
-- or you can combine it with a condition
exit Outer_Loop when Another_Condition_Met();
…
end loop;
end loop Outer_Loop;
-- execution will continue here after 'exit Outer_Loop;'
…
可以找到参考资料(对于 '95 版本的语言)here。