Bijay Kumar 
To create an empty array in PowerShell, assign @() to a variable. You can then add items with +=, and Count tells you how many it holds: Output: That’s fine for small lists. Below I cover typed and fixed-size arrays, a faster List, and the checks that trip people up. I ran every example in … Read more
To get the PowerShell array length, read the array’s .Count or .Length property. Both return the number of items, so $cities.Count gives 5 for a five-city array: The tricky part is what happens when a command returns one item, no items, or a collection that isn’t a plain array. I ran every case below in … Read more
To get the first element of an array in PowerShell, use index 0: $array[0]. For the last element, use -1: $array[-1]. Negative numbers count back from the end: Output: Below I cover getting several items at once, Select-Object, and the cases where these give surprising results. I ran every example in PowerShell 7.6 and Windows … Read more
To run a PowerShell script from the command line with parameters, start powershell.exe with -File, then the script path, then the parameters: Use pwsh.exe instead for PowerShell 7. Below I run real batch files to show quoting, arrays, switches and exit codes, which all behave a little differently from inside PowerShell. The sample script Every … Read more