Loop-ku waa mid ka mid ah aaladaha ugu qiimaha badan luuqad kasta oo barnaamij ah^{(valuable tools in any programming language)} ,  Microsoft PowerShellna^{(Microsoft PowerShell)} kama duwana. Waxaad isticmaali kartaa siddo kale si aad ugu celiso amarrada, laakiin loop-ka ayaa laga yaabaa inuu yahay kan ugu toosan.

Laga soo bilaabo dib-u-habaynta nidaamka ilaa fulinta hawl dhawr jeer ah, waxa jira waxyaabo badan oo aad ku gaadhi karto qalabkan. Halkan waxaa ah casharro ku saabsan sida loo isticmaalo Loops gudaha PowerShell .

Waa maxay Isticmaalka ^(Use)Loops ee PowerShell ?^(PowerShell)

Si ka duwan Command Prompt , PowerShell waa deegaan qoraal ah oo dhammaystiran. Tani waxay la macno tahay inaad qori karto qoraalada dib loo isticmaali karo ee PowerShell^{(PowerShell scripts)} si aad si otomaatig ah u qabato hawlaha halkii aad gacanta ku geli lahayd amarada. Oo loops ayaa fure u ah qorista cutubyadan.

Bayaanku wuxuu ku soo celiyaa qoraalka xannibaadda tiro waqtiyo gaar ah, isagoo wax ka beddelaya doorsoome la bixiyay si loola socdo horumarka. Tani waxay kuu ogolaaneysaa inaad u isticmaasho loop-ka xaaladaha qaarkood oo aad u xiiso badan.

Waxaad soo saari kartaa tirooyinka isku xigxiga, go'aamin kartaa lambarka koowaad, ama waxaad soo bandhigi kartaa saacad tirinta. Si ficil ahaan ah, waxaad ku celcelin kartaa walxo kala duwan, adigoo fulinaya qaar ka mid ah waxqabadyada gelitaanka kasta.

Habka Loop^(Syntax) ee PowerShell _ _^(Loop)

Siddooyinku waxay ugu shaqeeyaan Windows PowerShell si la mid ah sida ay ugu shaqeeyaan luqad kasta oo barnaamij ah. Odhaahyada bilaabaya doorsoomiyaha raadraaca, tijaabinta qiimihiisa, iyo wax ka beddelka doorsoomuhu waxay ku qotomeen gunta hoose ee soo socota "For," oo ay kala soocaan semicolons. Kadibna waxaa soo baxa liiska bayaanka laftiisa oo ay ku xidhan yihiin biraha qalloocan.

Loogu talagalay ( Bilaabidda^{(Initialization)} ; Xaalad^(Condition) ; Cusbooneysii^(Update) )

{

    Block Script^{(Script Block)}

}

Sida Loo Isticmaalo Loop -ka Qoraalka PowerShell^{(PowerShell Script)}

Isticmaalka loop-ka waa wax fudud. Mar kasta oo aad la kulanto xaalad ku baaqaysa in lagu celiyo tallaabo yar oo is bedbedelaysa, waa in aad gelisaa loop-ka ah.

Aynu nidhaahno waxaad u baahan tahay inaad qorto qayb yar oo kood ah oo heli karta wadarta dhammaan tirooyinka dabiiciga ah ilaa nambar n , oo ka kooban doorsoomaha $n. Halkan waxaa ah aasaaska Tusaalaha loop:

$n = 10

$sum = 0

loogu talagalay ($i = 1; $i-le $n; $i ++)

{

    $sum = $sum + $i

}

"Wadarta $n tirooyinka dabiiciga ah waa $ wadar"

Helitaanka Arraysyada Loop-ka

Soo saarista taxanaha tirooyinka aad ayay u adagtahay waxa dadka intiisa badani u isticmaalaan PowerShell . Isticmaalka aadka u badan ayaa ah in lagu celceliyo array.

Waxaad dhahdaa^(Say) waxaad haysaa array $ usbuuc ah oo leh todoba walxood. Waxaad soo saari kartaa liiska maalmaha ku jira shaxda adiga oo isticmaalaya loop fudud, sida lagu muujiyay tusaalahan soo socda.

loogu talagalay ($i = 0; $i -lt $usbuuc.Length; $i++)

{

    $ todobaad[$i]

}

Isticmaalka Loop^{(ForEach Loop)} -ka Qof Walba Si aad si dhakhso^{(Quickly Iterate)} ah ugu cel celiso iyada oo loo marayo Array

Nooca kale ee loop-ka waa bayaanka ForEach . Noocani waxa uu fududeeyaa in la dhex maro waxa ku jira shaxda PowerShell^(PowerShell) oo si gaar ah u habaysa. Qoraalkii hore, tusaale ahaan, waxa dib loo qori karaa sidan:

Foreach ($ maalin gudaheed $ usbuucii)

{

    $ maalin

}

Markaad la macaamilayso walxo kakan, waxaad sidoo kale isticmaali kartaa cmdlet Foreach-Object si aad u sameyso ficil ku saabsan waxa ku jira amar kasta oo PowerShell ah.

Sidee Loop^{(Loop Different)} -ku uga duwan yahay Noocyada^(Types) Kale ?^(Loops)

Loop-ku maaha nooca kaliya ee bayaanka wareegtada ee aad heli karto. Sida luqadaha barnaamijyada badankooda, PowerShell waxay leedahay noocyo badan oo loops ah.

Halka

Midda ugu fudud ee kuwan ka mid ah waa halka loop. Waxa kaliya ee aad haysato waa shuruud iyo xannibaad qoraal ah, oo loop-ku wuu socdaa ilaa iyo inta muujinta imtixaanku ay ku qiimayso run. Maaddaama odhaahda marka hore la qiimeeyo, waxaa jirta fursad aanu koodku u socon gabi ahaanba ama aanu ku dhammaanayn wareeg aan xad lahayn. 

Halka ( Xaalad^(Condition) )

{

    Block Script^{(Script Block)}

}

Samee-Inta

Haddii aad qorayso qoraal u baahan inuu ordo ugu yaraan hal mar - xitaa haddii odhaahda lagu qiimeeyo been - ka dib waxaad isticmaali kartaa Do-While loop. Farqiga kaliya ee u dhexeeya halka loop waa in ay dhigto xannibaadda amarka ka hor xaaladda, taas oo macnaheedu yahay in koodka la fuliyo ka hor inta aan la hubin muujinta tijaabada markii ugu horeysay.

samee {

    Script block

}

Halka ( Xaalad^(Condition) )

Samee-Ilaa

Nooca kale ee loop-kan waa Do-Illaa^(Do-Until) . Asal ahaan^(Basically) , waxay waddaa block code ka dibna ku celisaa ilaa muujinta imtixaanku run noqoto - gadaasha wareegyada Do-While . Ma aha qaab-dhismeed gaar ah oo faa'iido leh, maadaama aad ku gaadhi karto isla shay la mid ah adiga oo wax ka beddelaya xaaladda qaab-dhismeedka caadiga ah ee Do-While .

samee {

    Block Script^{(Script Block)}

}

Ilaa ( Xaalad^(Condition) )

Waa maxay sababta Loop-ku u fiican yahay

Dhibka leh dhammaan qaababkan kale ee looping-ka ayaa ah inaysan ku jirin qiimaha bilowga ah ama odhaahyada cusboonaysiinta. Waa inaad gacanta ku xasuusataa inaad doorsoome ku abuurto meel ka baxsan wareegga oo aad kordhiso (ama yarayso) inta lagu jiro gudbin kasta oo wareegga ah.

Sida aad filan karto, programmer-yadu waxay inta badan illoobaan tallaabadan, taasoo keenta qoraal aan u shaqayn sidii loogu talagalay. Tani waxay wakhti qaali ah ku luminaysaa khaladka.

Loop-ku wuxuu ka fogaanayaa arrintaan isagoo u baahanaya bilowga iyo kordhinta tibaaxaha gudaha xajinta bilowga. Tani waxay keenaysaa qoraallo nadiif ah oo ka adag.

Goorma ayay tahay inaad u isticmaasho Loop -ka PowerShell ?

PowerShell waa wax walba oo ku saabsan abuurista qoraallada si toos ah. Iyo malaha qalabka ugu faa'iidada badan ee tan lagu gaaro waa loop-ka. Waxaad u isticmaali kartaa inaad ku beddesho hawlgallo badan oo koobi-koobi ah oo aad adeegsan karto qoraal aad u kooban oo qurux badan.

Shaqada ugu badan ee loop-kan waa in lagu celceliyo array, hal gelid markiiba. Si aad u hesho qoraal xittaa oo la hagaajiyay, waxaad sidoo kale isticmaali kartaa loop ForEach ah. Waxa kale oo aad isticmaali kartaa loop-ka si aad u abuurto taxane tirooyin, in kasta oo taasi dhif tahay loo baahan yahay.

Dhibcaha loop-ku wuxuu ka sarreeyaa algorithms-yada kale ee looping-ka iyadoo lagu darayo dhammaan hawlaha muhiimka ah ee loop-ka ee cabbirrada, ka hortagga wixii khalad ah sababtoo ah illoobaan weedhahaas. Tani waxay ka dhigaysaa loop-ka lama huraanka ah xaalad kasta oo ku baaqaysa soo-celinta amarrada.

How a PowerShell For Loop Can Run a Command Multiple Times

The For loop is one of the most valuable tools in any programming language, and  Microsoft PowerShell is no different. You can use other loops to repeat commands, but the For loop is perhaps the most straightforward.

From iterating over arrays to carrying out a function a predetermined number of times, there are many things you can achieve with this tool. Here is a tutorial on how to use For loops in PowerShell.

What Is the Use of For Loops in PowerShell?

Unlike Command Prompt, PowerShell is a complete scripting environment. This means you can write reusable PowerShell scripts to automatically carry out tasks rather than entering commands manually. And For loops are the key to writing these modules.

A For statement repeats a script block a specific number of times, modifying a given variable to keep track of progression. This allows you to use the loop for some rather interesting scenarios.

You can generate sequences of numbers, determine a prime number, or display a countdown timer. More practically, you can iterate over an array of objects, performing some action with each entry.

The Syntax of a For Loop in PowerShell

For loops work in Windows PowerShell the same way they do in any programming language. Expressions initializing the tracking variable, testing its value, and modifying the variable are ensconced within the brackets following “For,” separated by semicolons. Then comes the statement list itself bound by curly braces.

For (Initialization; Condition; Update)

{

    Script Block

}

How to Use the For Loop in a PowerShell Script

Using the For loop is pretty simple. Whenever you encounter a situation that calls for repeating a slightly varying step, you should put it into a For loop.

Let’s say you need to write a code snippet that can find the sum of all natural numbers until a number n, contained in the variable $n. Here is a basic For loop example:

$n = 10

$sum = 0

For ($i = 1 ; $i -le $n ; $i++)

{

    $sum = $sum + $i

}

“The sum of $n natural numbers is $sum”

Accessing Arrays Through a For Loop

Generating numeric sequences is hardly what most people use PowerShell for. A more common usage is to iterate over an array.

Say you have an array $week with seven elements. You can output the list of the days contained in the array using a simple For loop, as demonstrated in the following example.

For ($i = 0 ; $i -lt $week.Length ; $i++)

{

    $week[$i]

}

Using the ForEach Loop To Quickly Iterate Through an Array

Another form of the For loop is the ForEach statement. This version simplifies going through the contents of a PowerShell array and processing them individually. The previous code snippet, for example, can be rewritten like this:

Foreach ($day in $week)

{

    $day

}

When dealing with more complex objects, you can also use the Foreach-Object cmdlet to perform an action on the contents of any PowerShell command.

How is the For Loop Different From Other Types of Loops?

The For loop isn’t the only type of looping statement available to you. Like most programming languages, PowerShell has multiple types of loops.

While

The simplest of these is the While loop. All you have is a condition and a script block, and the loop runs as long as the test expression evaluates to true. Since the expression is evaluated first, there is a chance for the code not to run at all or end up as an infinite loop. 

While (Condition)

{

    Script Block

}

Do-While

If you are writing a script that needs to run at least once – even if the expression evaluates to false—then you can use the Do-While loop. The only difference from the While loop is that it places the command block before the condition, which means that the code is executed before the test expression is checked for the first time.

Do {

    Script block

}

While (Condition)

Do-Until

Another version of this loop is Do-Until. Basically, it runs the code block and then repeats it until the test expression is true – the reverse of a Do-While loop. Not a particularly useful structure, as you can achieve the same thing by modifying the condition in a standard Do-While loop.

Do {

    Script Block

}

Until (Condition)

Why the For Loop is Better

The problem with all these other looping structures is that they do not include the initial value or update statements. You have to manually remember to create a variable outside the loop and then increment it (or decrement it) during every pass of the loop.

As you might expect, programmers often forget this step, leading to a script that doesn’t work as intended. This wastes precious time in debugging.

The For loop avoids this issue by necessitating the initialization and increment expressions within the starting brackets. This leads to cleaner, more robust scripts.

When Should You Use the For Loop in PowerShell?

PowerShell is all about creating scripts for automation. And probably the most useful tool for achieving this is the For loop. You can use it to replace many copy-paste operations with a more compact, elegant script.

The most common function of this loop is to iterate over an array, one entry at a time. For an even more streamlined script, you can use a ForEach loop as well. You can also use the For loop to generate numerical sequences, although that is rarely needed.

The For loop scores over other looping algorithms by including all essential functions of a loop into the parameters, preventing any errors due to forgetting those statements. This makes the For loop indispensable in any scenario calling for repeating a set of commands.

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