标签：
#break和continue命令：循环过程中，有时需要在未达到循环结束条件时强制跳出循环
#break：允许跳出所有循环（终止执行后面的所有循环）
1 while : #死循环写法# 2 do 3 echo -n " Input a number between 1 to 5 : " 4 read aNum 5 case ${aNum} in 6 1|2|3|4|5) 7 echo " Your number is ${aNum}" 8 ;; 9 *) 10 echo " You do not select a number betwwen 1 to 5 , game over ! " 11 break 12 ;; 13 esac 14 done
#循环嵌套，break可以跟一个参数，表示跳出第几层循环
#例：如果var1=2并且var2=0,跳出循环
for var1 in 1 2 3 do for var2 in 0 5 do if [ ${var1} -eq 2 -a ${var2} -eq 0 ] then break 2 else echo " ${var1} ${var2} " fi done done
#continue命令：不会跳出所有循环，仅仅跳出当前循环
#运行代码发现，输入的不是1-5的数字，循环也不会被终止。echo " game over " 永远不被执行
1 while : 2 do 3 echo " Input a number between 1 to 5 " 4 read aNum 5 case ${aNum} in 6 1|2|3|4|5) 7 echo " Your number is ${aNum} " 8 ;; 9 *) 10 echo " you do not select a number between 1 to 5 ! " 11 continue 12 echo " game over " 13 ;; 14 esac 15 done
#寻找偶数
1 numbers="1 2 3 4 5 6" 2 for NUM in ${numbers} 3 do 4 Q=` expr ${NUM} % 2 ` 5 if [ ${Q} -eq 0 ] 6 then 7 echo " Number is an even number " 8 continue 9 fi 10 echo " Found odd number " 11 done
Linux Gvim shell break和continue命令
标签：
原文地址：http://www.cnblogs.com/blog4matto/p/5572048.html
