How to add/remove values in the array in PowerShell?

PowerShell

An array is always a fixed size. To add value to the array, you need to create a new copy of the array and add value to it. To do so, you simply need to use += operator.

For example, you have an existing array as given below.

$array = 1,2,3,4,5

To add value “Hello” to the array, we will use += sign.

$array += "Hello"

Now, we will check the output of the array.

We have another method to add value to the array. By Add() operation of the array.

$array.Add("Hi")

When you use the above method to add a variable in the given array, you will get below error.

Exception calling "Add" with "1" argument(s): "Collection was of a fixed size."
At line:1 char:1
+ $array.Add("Hi")
+ ~~~~~~~~~~~~
+ CategoryInfo : NotSpecified: (:) [], MethodInvocationException
+ FullyQualifiedErrorId : NotSupportedException

This is because the array size is fixed. You can check if the array is a fixed size or not by using the below method.