Powershell Loop with two variables

If you want to group variables together, you could use an array of System.Management.Automation.PSCustomObject, then iterate this array and run your code:

param (
    [Parameter(Mandatory = $true)]
    [PSCustomObject[]]
    $StorageAccountData
)

foreach ($obj in $StorageAccountData) {
    $rgName = $obj.ResourceGroupName
    $accountName = $obj.AccountName
    $location = $obj.Location

    # Create a storage account with MinimumTlsVersion set to TLS 1.1.
    New-AzStorageAccount -ResourceGroupName $rgName `
        -AccountName $accountName `
        -Location $location `
        -SkuName Standard_GRS `
        -MinimumTlsVersion TLS1_1

    # Read the MinimumTlsVersion property.
    (Get-AzStorageAccount `
        -ResourceGroupName $rgName `
        -Name $accountName).MinimumTlsVersion

    # Update the MinimumTlsVersion version for the storage account to TLS 1.2.
    Set-AzStorageAccount `
        -ResourceGroupName $rgName `
        -AccountName $accountName `
        -MinimumTlsVersion TLS1_2

    # Read the MinimumTlsVersion property.
    (Get-AzStorageAccount `
        -ResourceGroupName $rgName `
        -Name $accountName).MinimumTlsVersion
}

Then you could run this script like so:

PS C:\Users\user> $storageAccountData = @(
>>     [PSCustomObject]@{
>>         ResourceGroupName = 'storageRG'
>>         AccountName = 'storage1'
>>         Location = 'australiaeast'
>>     }
>>     [PSCustomObject]@{
>>         ResourceGroupName = 'storageRG'
>>         AccountName = 'storage2'
>>         Location = 'australiaeast'
>>     }
>> )
PS C:\Users\user> script.ps1 -StorageAccountData $storageAccountData

If you want to pipe this into the script, you can create a function and use ValueFromPipeline:

function MyFunction {
    [CmdletBinding()]
    param (
        [Parameter(
            Mandatory = $true, 
            ValueFromPipeline = $true
        )]
        [PSCustomObject[]]
        $StorageAccountData
    )
    # rest of your code
}

Then pass the array of PSCustomObject down then pipeline to this function with $storageAccountData | MyFunction. Make sure to dot source the script to load the function into your preferred scope before calling the function.

Update

If you wanted to read from a CSV file(e.g. storage-accounts.csv):

AccountName,ResourceGroupName,Location
storage1,storageRG,australiaeast
storage2,storageRG,australiaeast

You just need use Import-Csv:

$storageAccountData = Import-Csv -Path .\storage-accounts.csv

foreach ($obj in $storageAccountData) {
    # rest of your code
}