while循环会在测试条件不再成立时停止。 后面还有例子用到数值比较: 3.2 使用多个测试命令 while命令允许你在while语句行定义多个测试命令。只有最后一个测试命令的退出状态码会被用来决定什么时候结束循环。 #!/bin/bash # testing a multicommand while loop var1=10 while echo $var1 [ $var1 -ge 0 ] #wh...
while[condition]dostatements1#Executedaslongascondition istrueand/or, up to a disaster-conditionifany.statements2if(disaster-condition)thenbreak#Abandon thewhilelopp.fistatements3#While good and, no disaster-condition.done In this example, the break statement will skip the while loop when user ente...
能够用keyword” break ” 用来跳出循环;也能够用keyword” continue ”用来不运行余下的部分而直接跳到下一个循环。 实例3-4-1 #!/bin/sh num=10 while [ ! “$num” = “0” ]; do #num=num-1 num=`expr “$num” “-” “1”` echo $num done 3.5、for for-loop表达式查看一个字符串列表...
The Bourne shell’s while loop uses exit codes, like the if conditional. For example, this script does 10 iterations: Bourne shell 的 while 循环使用退出代码,就像 if 条件一样。例如,此脚本进行了 10 次迭代: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 #!/bin/sh FILE=/tmp/whiletest....
#!/bin/bash # using a function in a script #创建函数func1 function func1 { echo "This is an example of a function" } #循环 count=1 while [ $count -le 5 ] #le:是否小于或等于 do func1 #循环里调用函数 count=$[ $count + 1 ] done echo "This is the end of the loop" func1...
while($val -ne 3) { $val++ Write-Host $val } In this example, the condition ($val is not equal to 3) is true while $val is equal to 0, 1, and 2. Each time through the loop, $val is incremented by 1 using the ++ unary increment operator. The last time through the loop ...
8、teme ntsdonewhile expressi on doblock of stateme ntsdoneuntilcomma ndforvariable in word1 word2 word3 .dodoblock ofstateme ntsblock of stateme ntsdone doneun til expressi on dodoneblock of stateme nts文件Bourne shell使用内建的测试命令。例如:测试-d文件是目录-f文件存在而且不是目录r当前的...
/bin/bash3# another example of how not to use theforcommand4fortestinNevada New Hampshire New Mexico New York North Carolina5do6echo"Now going to $test"7done8$ ./badtest19Now going to Nevada10Now going to New11Now going to Hampshire12Now going to New13Now going to Mexico14Now going ...
echo "Example: $FILE_NAME consume 12" echo " $FILE_NAME release" } function endless_loop() { echo -ne "i=0; while true do i=i+100; i=100 done" | /bin/bash & } function consume() { for i in `seq $1` do endless_loop ...
/// public override Version Version { get { return new Version(1, 0, 0, 0); } } /// /// This API Instructs the host to interrupt the currently running /// pipeline and start a new nested input loop. In this example this /// functionality is not needed so the method throws ...