Windows PowerShell Basics – How To Create powershell for loop

Jan 28, 20180 likes25,431 views

This document discusses using for loops in PowerShell. It provides an example PowerShell script that demonstrates incrementing and decrementing values using for loops. The script clears the host, then runs four for loops: one that increments by 1 from 0 to 5, one that increments by 2 from 0 to 10, one that decrements by 1 from 0 to -5, and one that decrements by 2 from 0 to -10. Each loop displays the current incremental or decremented value and a beep.

Windows PowerShell Basics – For Loop
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Table of Contents
Overview.......................................................................................................................................................1
Applies To..................................................................................................................................................1
Pre-Requisites ...........................................................................................................................................1
PowerShell Script – Function ........................................................................................................................1
Code Snippet – For loop............................................................................................................................1
PowerShell Output – For Loop..............................................................................................................2

Windows PowerShell Basics – For Loop
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Overview
PowerShell functions are helpful in saving time when you have repetitive task(s) to be executed. In this
guide we will demonstrate, as to how to construct a “for” loop with different incremental and
decremented values.
Applies To
Tested on Windows 10, Windows 2008 R2 and Windows 2012.
Pre-Requisites
Launch PowerShell Command Console or PowerShell ISE.
To run this script, Execution Policy should be set to either of these “AllSigned” or “RemoteSigned” or
“Unrestricted”, you can get current execution policy by running the command; “Get-ExecutionPolicy”.
Each Policy type and its purpose is shown in the below table.
Policy Type Purpose
Restricted No scripts can be run. Windows PowerShell can be used only in interactive mode.
AllSigned Only scripts signed by a trusted publisher can be run.
RemoteSigned Downloaded scripts must be signed by a trusted publisher before they can be run.
Unrestricted No restrictions; all Windows PowerShell scripts can be run.
PowerShell Script – Function
This PowerShell script demonstrates the usage of for loop in a PowerShell.
Code Snippet – For loop
The code snippet is for demonstrating “for” loop usage, wherein incremental and decrementing values
are demonstrated.
Clear-Host
Write-Host "`nIncrement by 1 for loop" -BackgroundColor Green -ForegroundColor White
#
# Increment by 1
#
for($Iterator=0; $Iterator -le 5; $Iterator++) {
Write-Host "Increment by 1 - Current Incremental Value " $Iterator
[console]::Beep(65, 100)
}

Windows PowerShell Basics – For Loop
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#
# Skip +2 or Increment by 2
#
Start-Sleep -Seconds 2
Write-Host "`nIncrement by 2 for loop" -BackgroundColor Green -ForegroundColor White
for($Iterator=0; $Iterator -le 10; $Iterator += 2) {
Write-Host "Increment by 2 - Current Incremental Value" $Iterator
[console]::Beep(37, 100)
}
#
# Decrement by 1
#
Start-Sleep -Seconds 2
Write-Host "`nDecrement by 1 for loop" -BackgroundColor Green -ForegroundColor White
for($Iterator=0; $Iterator -ge -5; $Iterator--) {
Write-Host "Decrement by 1 - Current Decremented Value" $Iterator
[console]::Beep(37, 100)
}
#
# Skip -2 or Decrement by 2
#
Start-Sleep -Seconds 2
Write-Host "`n Skip -2 or Decrement by 2 for loop" -BackgroundColor Green -ForegroundColor White
for($Iterator=0; $Iterator -ge -10; $Iterator -= 2) {
Write-Host "Decrement by 2 - Current Decremented Value" $Iterator
[console]::Beep(37, 100)
}
PowerShell Output – For Loop
When script is executed; below output will be displayed.

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