Example 3 - Reading Files and Directories Using for Loop Programmers can use the for loop statement to read and print the list of files and folders of the current directory. First, create a file name and execute the following script. Users must note that the ‘*’ is used to read files...
Caution:Please be careful if you use this method. You should not include the keyword “in” in the for loop. If you leave the keyword “in” without any values, it will not use the positional parameter as shown below. It will not go inside the loop. i.e for loop will never get ex...
The "for" loop iterates through each file in the current directory using the wildcard *, which matches all files and directories. Within the loop, the script checks if each item is a regular file using the -f test operator. If the item is a regular file, its filename is printed to ...
In the previous examples, we explicitly listed the values to be iterated by thefor loop, which works just fine. However, you can only imagine how cumbersome and time-consuming a task it would be if you were to iterate over, for example, a hundred values. This would compel you to type ...
Use aforloop:fordin$(find/path/to/dir-maxdepth1-type d)do#Do something, the directory is accessible with $d:echo$ddone>output_file It searches only the subdirectories of the directory/path/to/dir. Note that the simple example above will failifthe directory names contain whitespace or spe...
for i in $(find $dir -type f); do echo $i; done; Conclusion The above are example scripts you can use to loop directories and perform a specific action. It is good to note there are tools developed to perform such tasks, but a script is a good way to go if you can’t find ...
Among the three types of loops (while, do-while, for ), for loop is very useful to do various types of iterative tasks. The basic uses of ‘for' loop is shown here. for loop can be used by two ways in bash. One way is ‘for-in' and another way is the c-s
for ((i=1;i<=mynumber;i++)) do factorial=$(($factorial*$i)) done echo $factorial 17. Create Directories It is effortless to create directories in bash unless you need to create a lot of directories quickly. In the following example, we will use the bash script to create a set of...
The output of this for loop should be:10 9 8 7 6 5 4 3 2 1With if statements, we can also define else if by using elif statement:#!/bin/bashecho "Enter a valid number"read nif [ $n -eq 101 ];thenecho "This is the first number"elif [ $n -eq 510 ];thenecho "This is...
for, while, until, 或 select 循环的下一次开始。如果指 定了 n,复位到向外第 n 层循环的开始。 n 必须 ≥ 1。如果 n 比外部 循环的层数要多,将复位到最外层的循环 (‘‘top-level’’ loop,顶层循 环)。返回值是 0,除非执行 continue 时,shell 不是在循环之中。 declare [...