在Bash脚本,有3种类型loops:for loop,while loop, 和until loop. 这三个用于迭代值列表并执行一组给定的命令。 Bash For 循环语法 for loop遍历一系列值并执行一组命令。 For loop采用以下语法: forvariable_name in value1 value2 value3..ndocommand1 command2 commandn done 1. 2. 3. 4. 5. 6. Ba...
1、for循环 for循环一般格式为: for变量in列表docommand1 command2 ... commandNdone 列表是一组值(数字、字符串等)组成的序列,每个值通过空格分隔。每循环一次,就将列表中的下一个值赋给变量。 in 列表是可选的,如果不用它,for 循环使用命令行的位置参数。 举例顺序输出列表中的数字 forloopin12345doecho"...
更详细信息 请看:Bash For Loop Examples In Linux for循环语法 数字范围的语法如下: 代码语言:javascript 复制 forVARIABLEin12345..Ndo command1 command2 commandNdone 或 代码语言:javascript 复制 forVARIABLEinfile1 file2 file3do command1 on $VARIABLEcommand2 commandNdone 或 代码语言:javascript 复制 forO...
A 'for loop' is a bash programming language statement which allows code to be repeatedly executed. A for loop is classified as an iteration statement i.e. it is the repetition of a process within a bash script. Tutorial details For example, you can run UNIX command or task 5 times or ...
Method 1: Bash For Loop using “in” and list of values Syntax: for varname in list do command1 command2 .. done In the above syntax: for, in, do and done are keywords “list” contains list of values. The list can be a variable that contains several words separated by spaces. If...
As a final note,the use of semaphore is incompatible with the:::syntax, and it also limits the ability to pass arguments from a list or file directly to parallelized jobs within the same command, requiring alternative methods of argument distribution. In this case, we needed aforloop to pas...
当i大于等5的时候,进行if选择语句,但是由于continue语句的存在,直接跳出了当前的循环,进入下一个循环,所以echo "loop finished."永远都不会被执行。 三、相关练习 1、分别求100以内所有偶数之和,100以内所有奇数之和。(分别用for、while、until实现)
fruit=orange; and on the third and final iteration,fruit=pear. Once it has completed the loop, the script continues normal execution with the next command after thedonestatement. In this case, it ends by saying “Let’s make a salad!” to show that it has ended the loop, but not the...
bash show for loop变量两次 在Bash中,使用for循环可以遍历一个列表或者一系列的值。当需要在循环中显示循环变量两次时,可以使用以下方式: 代码语言:txt 复制 for var in list do echo $var$var done 上述代码中,var是循环变量,list是需要遍历的列表或者值。echo $var$var用于显示循环变量两次。 这种方法适用于...
$ bash forloop.sh The counter is now 1 The counter is now 2 The counter is now 3 The counter is now 4 The counter is now 5 The counter is now 6 The counter is now 7 The counter is now 8 The counter is now 9 命令组( {..} ) ...