How to concatenate array of integers into comma separated string

Question

I have two question, acually:

1. How to join array of integers into comma separated string? (1,2,3) => \"1,2,3\"
2. How to convert array of integers t

Answer 1

This worked for me:

[String]::Join(",", $arraylist.ToArray())

I got 1,2.

And then the second part:

foreach($number in $arraylist) { $number.ToString() }