PowerShell for loop is also a good choice for mathematical operations. In this example, for loop is used to determine if a given number is a prime number. Aprime numberis a number that is only divisible by 1 and
xtitlebar — change the name of an xterm, gnome-terminal or kde konsole USAGE: xtitlebar [-h] “string_for_titelbar” OPTIONS: -h help text EXAMPLE: xtitlebar “cvs” HELP exit 0 } # in case of error or if -h is given we call the function help: [ -z “$1” ] && help [...
it will not use the positional parameter as shown below. It will not go inside the loop. i.e for loop will never get executed as shown in the example below.
# another example of how not to use the for command for test in I don\'t know if "this'll" work do echo "word:$test" done 示例 你可能遇到的另一个问题是有多个词的值。记住,for循环假定每个值都是用空格分割的。 #!/bin/bash # another example of how not to use the for command for...
$test变量保持了其值,也允许我们修改它的值,并在for命令循环之外跟其他变量一样使用。 1.2、读取列表中的复杂值 事情并不会总像你在for循环中看到的那么简单。有时会遇到难处理的数据。下面是给shell脚本程序员带来麻烦的典型例子。 1$catbadtest12#!/bin/bash3# another example of how not to use theforco...
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 [ $count -le 5 ] #le:是否小于或等于 do func1 #循环里调用函数 count=$[ $count + 1 ] done echo "This is the end of the loop" func1...
13.如果变量person匹配user root,loop控制将会到达for循环的头,处 理下一个person。14.continue语句是loop控制从12行开始,而不是16行。15.else语句。16.17.next语句,使用cat命令。18.,循环,移动到下一个人。19.$#值是位置参数号.如果号码为0,则food列表为空。20.重置food列表。21.done关键字表明for循环结束...
这篇笔记用来收集在日常开发中所用到的安卓adb shell命令,参照了一些大佬的再加上我自己平时用到的整理在了一块儿,感谢无私共享的大佬们。 将会持续更新,欢迎收藏~ 一、基本用法 命令语法 adb 命令的基本语法如下: adb [-d|-e|-s <serialNumber>] 如果只有一...
Understanding positional parameters is fundamental for effective shell script development.22. How do you read input from a file line by line in a shell script? You can use a while loop with the read command to read input from a file line by line. For example:...