考虑一下我在开始提到的最简单的场景。让我们使用for循环打印从 1 到 10 的数字: 复制 #!/bin/bashfornumin{1..10};doecho$numdone 1. 2. 3. 4. 如果你运行它,你应该会看到像这样的输出: 复制 $ ./for-loop.sh12345678910 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 你也可以使用for num...
只要num小于或等于 10,while 循环就会检查条件并运行脚本。 因此,现在运行脚本将会显示出和之前for循环中看到的完全相同的结果。 1 2 3 4 5 6 7 8 9 10 让我们看另一个例子。这是一个Bash 脚本,它接受一个数字作为参数并显示该表。 #!/bin/bash echo"Table for $1 is:" index=1 while[$index-le10...
for n in a b c d e do while true do if [ $RANDOM -gt 20000 ] then printf . break 2 ## break out of both while and for loops elif [ $RANDOM -lt 10000 ] then printf '"' break ## break out of the while loop fi done done echo 继续 在循环内部, continue命令通过传递任何剩余...
循环中断控制符有:break、continue 循环语句示例 for-in AI检测代码解析 #! /bin/bash for num in 1 22 14 55 do echo $num done echo "1 2 3 4 5 loop output" for num in `seq 5` do echo $num done echo "charactor string" for str in hello world "hello, world" do echo $str done 1...
在Bash 脚本中,count(非空白)代码行用于统计指定命令或表达式的行数。其中,non-blank 表示不包括空白字符的空行。通过在脚本中使用这一功能,您可以对特定代码段、操作步骤进行计数。要使...
forloopin1 2 3 4 56doechoThe value is:$loopdone## 字符串forstrinThis is a stringdoecho$strdoneprintf"\n## 遍历数组\n"### 一for((i=0;i<${#arr[@]};i++))doecho${arr[i]}done;### 二forain${arr[@]}doecho${a}done### 三foriin"${!arr[@]}"doprintf"%s\t%s\n""$i...
In this example, we have two arrays:fruitsandcolors. We use a ‘for’ loop to iterate through the indices of thefruitsarray (obtained using the!symbol before the array variable). For each iteration, we print out a sentence that combines elements from both arrays at the same index. ...
“e” that has been getting the total size of this array “Arr2” using the “@” operator within its index. The “for” loop has been utilized to iterate the array and display each of its string values at the Bash shell using the “echo” statement and index “I”. Let’s save ...
在编程术语中，这被称作执行控制，for 循环就是其中最常见的一种。
Notice that the first element has anindexof 0. You can get any of the elements this way, for example the fourth element: echo${plagues[3]} ## flies To get all of the elements ofplaguesuse a star (*) between the square brackets: ...