CODEWITHSUNDEEP
powershellscriptingdigits
techguy1029
techguy1029

Reputation: 831

How do I make a range of numbers print off only as double digits?

I need to be able to print off a range of numbers only as double digits. For example, 01,02,03,04...10,11.

https://forums.overclockers.co.uk/threads/powershell-convert-1-digit-number-to-2-digit-number.18279138/

This is the script I am trying it in:

# Define a range's upper bound dynamically (IRL via user input)
$upperBound = 18

# Create an array of numbers (indices).
1..$upperBound

I tried using "{0:D2}" as the above site stated but I got a error "Cannot convert value":

1.."{0:D2}" -f $upperBound

I also tried this;

"{0:D2}" -f $upperBound

However, this only display the one number that was entered, not the entire range. For example, if I enter 2, I will get 02. I would like it to display 01,02.

In addition to this, I would like this range to be displayed next to a server name. I have a list of servers and this range would have to be attached to the server name. Example:

server01
server02

Upvotes: 1

Views: 2173

Answers (2)

Robert Cotterman
Robert Cotterman

Reputation: 2268

$upperbound = 18
$totalArray = 1..$upperbound | foreach {$_.tostring('00')}
foreach ($server in (cat serverlist.txt)) {
    $totalarray | foreach {"$server$_"}
}

replace 00 with how many places you want 0's to take

0 = 1,2,3 etc..

00 = 01, 02, 03 etc...

000 = 001, 002, 003 etc..

if you want to display server digits in a single line with commas you could just do 

$totalArray -join ','

Upvotes: 0

mklement0
mklement0

Reputation: 440679

The range operator (..) only operates on numbers as endpoints; in order to format the resulting array of numbers you must apply post-processing on the elements of the array created by ..:

Note: The sample output below assumes that $upperBound has a value of 3.

Using PSv4+ syntax:

PS> (1..$upperBound).ForEach({ '{0:D2}' -f $_ })
01
02
03

In PSv3-, use:

foreach ($ndx in 1..$upperBound) { '{0:D2}' -f $ndx } # same output as above.

To make the formatted "number strings" part of a server name:

PS> (1..$upperBound).ForEach({ 'server{0:D2}' -f $_ })
server01
server02
server03

In order to create a list of names as a single string with separators, use the -join operator on the resulting array:

PS> (1..$upperBound).ForEach({ 'server{0:D2}' -f $_ }) -join ','
server01,server02,server03

In PSv3-:

$(foreach ($ndx in 1..$upperBound) { 'server{0:D2}' -f $ndx }) -join ','

Upvotes: 1

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