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. For example, you can run UNIX command or task 5 times or read and process...
Example-1: Reading static values Create a bash file named loop1.sh with the following script to read the values from a list using for loop. In this example, 5 static values are declared in the lists. This loop will iterate 5 times, and each time, it will receive a value from the li...
Run the script. $ bash forloop1.sh Here, a text of 5 words is taken, so five lines of output are printed. Example-2: For loop with a break statement ‘break’ statement is used inside ‘for’ loop to terminate from the loop. Create a file named ‘forloop2.sh’ with the following...
Using the for loop, it is straightforward to read the predefined strings or array. Here is an example of how you can use the for loop. In the example, we will take the input value of a text that has multiple words that will be taken after executing the script. We will use the for...
If you don’t specify the keyword “in” followed by any list of values in the bash for loop, it will use the positional parameters (i.e the arguments that are passed to the shell script). $ cat for3.sh i=1 for day do echo "Weekday $((i++)) : $day" ...
Example 5: C-style for Loop #!/bin/zshfor((i=1;i<=5;i++))doecho"Number:$i"done Practical Example: Creating Backup Files Create the script file backup.sh: nano backup.sh Add the following content: #!/bin/zshsource_dir="/path/to/source_directory"backup_dir="/path/to/backup_direct...
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Bash Until Example 6. Waiting for the Machine to come up This example is used to wait till the machine comes up before doing a ssh to that machine. The until loop statement ends only when the ping gives the responses. $ cat mac_wait.sh ...
for n in {1..7}; do echo $n done Once the shell script is executed, all the values in the range are listed, similar to what we had insimple loops. Bash For Loop with Ranges Example Additionally, we can include a value at the end of the range that is going to cause thefor loop...
Bash for Loop to Create a Conditional Exit With Break Loop In addition to the three-expression structure, usefor-into automatically stop the loop when the script operation meets a specific condition. Here’s the code syntax: for i in 1 2 3 4 5 do if [condition] then break fi statement...