return:函数返回
exit:脚本进程退出
break:退出当前循环
continue:退出当前循环进入下一次循环
continue跳高本次循环进入下一次
shiyanlou:Desktop/ $ while read line;do (($line<3)) || continue;echo line=$line;done
2
line=2
3
4
5
6
1
line=1
3
shiyanlou:Desktop/ $ while read line;do (($line<3)) && continue;echo line=$line;done
1
2
3
line=3
4
line=4
5
line=5
^C% shiyanlou:Desktop/ $
break跳出循环
shiyanlou:Desktop/ $ while read line;do (($line<3)) && break;echo line=$line;done
4
line=4
5
line=5
1
shiyanlou:Desktop/ $
