The output for the for loop with command substitution as demonstrated in the above example would be: Bash For Loop: C Style Syntax The C style syntax suits users who are more accustomed to the for loop syntax in other languages like C, C++, Java, JavaScript, etc. Here is the basic synt...
When arguments are listed for a for loop, they are called an explicit list. An explicit list is the simplest form of an argument list. The loop is executed once for each list element. The following example is a for loop using an explicit list of elements: #!/bin/bash for fruit in ap...
This type of for loop is characterized by counting. The range is specified by a beginning (#1) and ending number (#5). The for loop executes a sequence of commands for each member in a list of items. A representative example in BASH is as follows to display welcome message 5 times wit...
In this form, the for statement executes the commands enclosed in a body, once for each item in the list. For example, if the list of values contains 5 items, the for loop will be executed a total of 5 times, once for each item in the list. The current item from the list will b...
For example: #!/bin/bash # For loop with seq command for i in $(seq 0 2 10) do echo "Element $i" done The output prints each element generated by theseqcommand. Theseqcommand is a historical command and not a recommended way to generate a sequence. The curly braces built-in method...
Example-3: Reading Command-line arguments Command-line arguments values can be iterated by using for loop in bash. Create a new bash file namedloop3.shwith the following script to read and print the command-line argument values using for loop. ...
Example 01: Simple For Loop Within the terminal shell, we will be creating a new Bash file named “bash.sh” with the “touch” instruction. This file will be created in our system’s home directory. This file needs to be opened in some editor i.e., nano, vim, or text to add cod...
<loop-body> done Example #1: Integer Comparison inwhileLoop inbash In awhileloop, integer comparison inside the square brackets should be expressed usingbash's built-in comparison operators (-eq for "equal to", -ne for "not equal to", -gt for "greater than", -ge for "greater than or...
While loop in bash The while loop tests a condition and then keeps on looping as long as the condition is true. while [ condition ]; do commands done If you take the previous example, it can be rewritten using the while loop like this: ...
Here, I have assigned the value4to a variable, whereas it can be some count, like word count etc. See example output: 1234 NestedforLoop in Bash We have a variety of nestedforloops in bash. According to our requirement, we can create several variations of the nestedforloops (i.e., ...