#!/bin/bash while : do echo -n "Input a number between 1 to 5: " read aNum case $aNum in 1|2|3|4|5) echo "Your number is $aNum!" ;; *) echo "You do not select a number between 1 to 5, game is over!" break ;; esac done在嵌套循环中，break 命令后面还可以跟一个整数，表示跳出第几层循环。例如：
break n表示跳出第 n 层循环。
#!/bin/bash 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如上，break 2 表示直接跳出外层循环。运行结果：
1 0 1 5continue命令
#!/bin/bash while : do echo -n "Input a number between 1 to 5: " read aNum case $aNum in 1|2|3|4|5) echo "Your number is $aNum!" ;; *) echo "You do not select a number between 1 to 5!" continue echo "Game is over!" ;; esac done运行代码发现，当输入大于5的数字时，该例中的循环不会结束，语句
echo "Game is over!"永远不会被执行。
#!/bin/bash NUMS="1 2 3 4 5 6 7" for NUM in $NUMS do Q=`expr $NUM % 2` if [ $Q -eq 0 ] then echo "Number is an even number!!" continue fi echo "Found odd number" done运行结果：
Found odd number Number is an even number!! Found odd number Number is an even number!! Found odd number Number is an even number!! Found odd number
原文地址：http://blog.csdn.net/wu20093346/article/details/47253477
