PowerShell Command for Azure not running as expected

I am trying to install a custom VM into Azure using the manufacturer's instructions. I have imported the AzurePublishSettingsFile and logged onto Azure.  When I follow the next set of instructions I get errors:

PS C:\WINDOWS\system32> $sub = get-azuresubscription
PS C:\WINDOWS\system32> $sub = get-azuresubscription -extendeddetails
PS C:\WINDOWS\system32> select-azuresubscription -subscriptionid $sub.subscriptionid -current
Select-AzureSubscription : Cannot convert 'System.Object[]' to the type 'System.String' required by parameter
'SubscriptionId'. Specified method is not supported.
At line:1 char:42
+ select-azuresubscription -subscriptionid $sub.subscriptionid -current
+                                          ~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : InvalidArgument: (:) [Select-AzureSubscription], ParameterBindingException
    + FullyQualifiedErrorId : CannotConvertArgument,Microsoft.WindowsAzure.Commands.Profile.SelectAzureSubscriptionCom
   mand

I know very little about PowerShell, I only follow the directions when they are called for. I know enough to know that an object and a string are different things but I don't know how to approach fixing it. Any help would be appreciated.
jconklin-ansinc-netAsked:
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footechCommented:
In this case, the cmdlet Get-AzureSubscription must be returning multiple subscriptions, so $sub is an array.  You will need to pick the correct one.
You can run a command like $sub.count to see how many there are.  Run $sub to see all that are stored in the variable - they will be listed in order, starting the count from 0.  You can return just a particular one by running $sub[1] (replace 1 with the number of the item in the array).

Another method that can be used:
$sub = get-azuresubscription -extendeddetails | Out-GridView -OutputMode Single
A window will pop up with all the subscriptions.  You just need to select the right one, and then click OK.  The one you selected will be stored in the $sub variable, and the rest of your commands should work without modification.
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jconklin-ansinc-netAuthor Commented:
That was it! I used the number in the command and it gave no errors.
select-azuresubscription -subscriptionid $sub[0].subscriptionid -current
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