As long as thewhileloop condition remains true, the code block within the loop is executed repeatedly.In contrast, the loop terminates if the condition evaluates to false. 3. Including User Input Into awhileLoop Condition In shell scripting, using user input as a condition for awhileloop adds...
The string comparison can be a little tricky using the while loop. In the context of shell scripting the-eqare calledinteger comparison operators. So, these operators cannot be used to compare strings. To compare strings in the shell scripting the string comparison operators=,==,!=are used. ...
Upon execution, the program has started to output the string “hello” without stopping as per the following output. If you want to exit this one-line loop, press “Ctrl+X” on the shell. Now, check out the output in the following screenshot: Example 02: Let’s look at another one-l...
3、/etc/rc.d/rc3.d目录下分别有多个以K开头和以S开头的文件;分别读取每个文件,以K开头的输出为文件加stop,以S开头的输出为文件名加start,如K34filename stop S66filename start for files in /etc/rc.d/rc3.d/[KS]* ;do if [ `basename $files|cut -c1` == "K" ] ;then echo "$files stop...
In the above code snippet, the for loop generates the random number at max number of times. RANDOM is an internal bash function that returns a random integer at each invocation. Bash While Loop Another iteration statement offered by the shell programming language is the while statement. ...
For other until loop examples such as integer comparison, string comparison and multiple conditions, refer to those demonstrated in the while loop.If you find this tutorial helpful, I recommend you check out the series of bash shell scripting tutorials provided by Xmodulo....
Python uses the while and for keywords to constitute a conditional loop, by which repeated execution of a block of statements is done until the specified boolean expression is true. The following is the while loop syntax. Syntax: while [boolean expression]: statement1 statement2 ... statement...
Shell scripting, specifically Bash scripting, is a great way to automate repetitive or tedious tasks on your systems. Why type when you can schedule and run scripts in a hands-free manner? One of the many scripting constructs is the loop. A loop is a section of code that picks up data ...
Example 1: Infinite While loop in a shell script An infinite While loop means your script will run the loop commands non-stop. Infinite While loops never stop running and this occurs when the condition always turns out to be “True.” ...
In this example, the game loop runs the game logic. First, it takes the user’s guess withinput(), converts it into an integer number, and checks whether it’s greater or less than the secret number. Theelseclause executes when the user’s guess is equal to the secret number. In tha...