How To Create An Array Reading from Host? [duplicate] - powershell

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Parsing a file to create an array of lines
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I am creating a script that will allow batch creation of new users but am running into an issue with the creation of the array.
$fname = #()
$lname = #()
$i = 0
$fname[$i] = Read-Host "`nWhat is the first name of the new user?"
$fname[$i] = $fname[$i].trim()
$lname[$i] = Read-Host "What is the last name of the new user?"
$lname[$i] = $lname[$i].trim()
If I run this I get the error:
Index was outside the bounds of the array.
At line:1 char:1
+ $fname[$i] = Read-Host "`nWhat is the first name of the new user?"
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : OperationStopped: (:) [], IndexOutOfRangeException
+ FullyQualifiedErrorId : System.IndexOutOfRangeException
Method invocation failed because [System.Object[]] does not contain a method named 'trim'.
At line:2 char:13
+ $fname[$i] = $fname.trim()
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : InvalidOperation: (:) [], RuntimeException
+ FullyQualifiedErrorId : MethodNotFound

Answer 1

You are creating an array with an fixed size of zero. As $fname[0] doesn't exist in the array you can't change it's value. One solution would be to use += to add an element to your existing array:
$fname = #()
$lname = #()
$i = 0
$fname += Read-Host "`nWhat is the first name of the new user?"
$fname[$i] = $fname[$i].trim()
$lname += Read-Host "What is the last name of the new user?"
$lname[$i] = $lname[$i].trim()
As a side note, I personally wouldn't use different arrays for my user information but instead create PSCustomObject:
$UserTable = #()
$obj = New-Object psobject
$obj | Add-Member -MemberType NoteProperty -Name FirstName -Value (Read-Host "`nWhat is the first name of the new user?").Trim()
$obj | Add-Member -MemberType NoteProperty -Name LastName -Value (Read-Host "What is the last name of the new user?").Trim()
$UserTable += $obj
$i = 0
$UserTable[$i].FirstName
$UserTable[$i].LastName