How to Create an Empty Array Of Arrays In Powershell?

Published on Sep 14, 2025

2 min read

To create an empty array of arrays in PowerShell, you can use the following syntax:

$arrayOfArrays = @()

This will create an empty array that can hold other arrays. You can then add arrays to this main array as needed by using the += operator.

How to filter an array in PowerShell?

To filter an array in PowerShell, you can use the Where-Object cmdlet.

Here is an example of how to filter an array of numbers to only include values greater than 5:

$numbers = 1, 3, 6, 8, 10 $filteredNumbers = $numbers | Where-Object { $_ -gt 5 }

In this example, $filteredNumbers will contain the values 6, 8, and 10 from the original array $numbers.

You can adjust the filter criteria inside the script block {} to suit your specific requirements.

Here's a simple example of how to reverse an array in PowerShell:

# Define an array $array = 1, 2, 3, 4, 5

[array]::Reverse($array)

$array

When you run this code, it will reverse the elements in the array so that the output will be [5, 4, 3, 2, 1].

To merge arrays in PowerShell, you can use the "+" operator to combine two or more arrays into one. Here is an example:

$array1 = 1, 2, 3 $array2 = 4, 5, 6 $mergedArray = $array1 + $array2

Write-Output $mergedArray

This will output:

1 2 3 4 5 6

Alternatively, you can use the "AddRange()" method to merge arrays. Here is an example:

$array1 = 1, 2, 3 $array2 = 4, 5, 6

$array1.AddRange($array2)

Write-Output $array1

This will also output:

1 2 3 4 5 6