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Powershell adding leading zeros to string or int

I was working on a script project where I wanted to create and defined names for multiple virtual machine in the series, with maintaining length of the string of names with numbers adding leading zeros, Below -f format operator one-liner command helps me to create the list.

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1..10 | ForEach-Object {"{0:d4}" -f ($_ * 11)}

1..10 | ForEach-Object {"{0,10}" -f ($_ * 11)}

This works very well with numbers.

Microsoft Powershell padleft foreach-object -f operator format operator scripting adding leading 0 zero padright string and integer int.png

Using the same technique I have created some interesting math function as below.

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$numbers = 1..9
foreach ($number in $numbers) {
    $spaces = $numbers[-$number]
    [int]$range = 1..$number -join ''
    $result = ($range * 8) + $number
    "{0, $spaces}{1} X 8 + {2} = {3}" -f '', $range, $number, $result
}

Microsoft PowerShell numbers -f operator foreach foreach-object -join operator padleft add leading 0 zeroes servernames filenames.png

There is alternative option, if you are looking to add 0 or spaces in front of string, there is method called padleft() on the string and it is as below.

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'a.doc', 'abc.doc', 'newsbbc.doc' | ForEach-Object {$_.padleft(15)}

'a.doc', 'abc.doc', 'newsbbc.doc' | ForEach-Object {$_.padleft(15,'0')}

Microsoft PowerShell numbers -f operator foreach foreach-object -join operator padleft add leading 0 zeroes servernames filenames padleft and padright string integer int.png

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 Posted in Powershell
  Tags powershell scripting

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