Dynamically create variables in PowerShell

Question

How do I create a new variable each time a loop runs?

Something along the lines of

for ($i=1; $i -le 5; $i++)
{
    $"var + $i" = $i
    write-host $"var + $i
}

Roman Kuzmin · Accepted Answer · 2012-10-22 16:10:52Z

61

Use New-Variable and Get-Variable (mind available options including scopes). E.g.

for ($i=1; $i -le 5; $i++)
{
    New-Variable -Name "var$i" -Value $i
    Get-Variable -Name "var$i" -ValueOnly
}

answered Oct 22, 2012 at 16:10

Roman Kuzmin

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6 Comments

EBGreen Over a year ago

perfectly valid answer. I would add that anytime that I need to do something like this, I prefer to use a hash table.

Roman Kuzmin Over a year ago

I also prefer hashtables. Still, there are some (rare) cases where only these cmdlets help.

George Mauer Over a year ago

An example is in a psake block like the properties block where you need to do something REALLY dynamic.

YorSubs Over a year ago

Can you give an example of how you would answer the original question using a hashtable @EBGreen? I'm not seeing how hashtables would help for this scenario? Or can you show what alternative scenario you are referring to?

Roman Kuzmin Over a year ago

@YorSubs here is the example: $data = @{}; for ($i=1; $i -le 5; $i++) { $data["var$i"] = $i; Write-Host $data["var$i"] }

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