Convert a number entered by a user in PowerShell into an array by counting

Question

I have a PowerShell script I am using to automate creating volumes on a SAN. The script prompts the user to enter the pertinent information: number of volumes, volume size and naming pattern. Next it should run a command on the array to create the volumes using the information provided. Here is where I am stuck. Right now the script asks the user to specify the number of volumes to create. For example let's say the user enters the number 4. I a stuck on how to take 4 and make it an array 1,2,3,4 or 7 to 1,2,3,4,5,6,7. Maybe there is an easier way to do this via counting or some other function. I am new to scripting, so any help is greatly appreciated.

# Define the number of volumes to create
$num_vols = read-host "Please enter the number of volumes"

# Define naming pattern
$vol_name = read-host "Please enter the volume naming pattern"

What I wanted to do was create a function that would basically run something like:

# Run command to create volumes on array
foreach ($i in $num_vols){
    & "command to execute" $vol_name + $i
}

Thanks for the suggestions. I am now using:

# Run command to create volumes on array
foreach ($i in 1..$num_vols){
    & "command to execute" $vol_name"."$i
}

Works perfectly! I can now create X volumes named VolName.1, VolName.2 and so on, where X is the number of volumes entered by the user.

Based on your question I am not entirely sure what you are asking. Do you want to simply execute the command some number of times or do you actually need a number of array elements ? — Display name
– Display name, Commented Oct 7, 2015 at 17:51

Bacon Bits · Accepted Answer · 2015-10-07 17:47:22Z

2

You can use the range operator (..):

foreach ($i in 1..$num_vols) { ... }

Or the range operator like this:

1..$num_vols | ForEach-Object { ... }

Or you can use a traditional for loop:

for ($i = 0; $i -lt $num_vols; $i++) { ... }

answered Oct 7, 2015 at 17:47

Bacon Bits

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