Right

There is no built in method to return the RIght N characters of a string, but we can use .SubString().

To return the rightmost 5 characters, we start at the character (5 less than the string length) and count 5 characters:

$var = "Hello world"
$result = $var.SubString($var.length - 5, 5)
$result

However this assumes the string will always be at least 5 characters long to start with. To make this more robust the number of characters can be restrained to be no more than the initial length of the string using [math]::min()

To return the rightmost 50 characters:

$var = "Hello world"
$startchar = [math]::min($var.length - 50,$var.length)
$startchar = [math]::max(0, $startchar)
$length = [math]::min($var.length, 50)
$var.SubString($startchar ,$length)

If the string is shorter than 50 characters, the above will display all the available characters rather than throw an error.

For quick re-use this can be placed into a function:

Function right {
   [CmdletBinding()]
 
   Param (
      [Parameter(Position=0, Mandatory=$True,HelpMessage="Enter a string of text")]
      [String]$text,
      [Parameter(Mandatory=$True)]
      [Int]$Length
   )
$startchar = [math]::min($text.length - $Length,$text.length)
$startchar = [math]::max(0, $startchar)
$right = $text.SubString($startchar ,[math]::min($text.length, $Length))
$right
}

Example:
PS C:\> right "hello world" -length 5

“We look forward to the time when the Power of Love will replace the Love of Power.
Then will our world know the blessings of peace” ~ William Gladstone

Related PowerShell Cmdlets

Left - Use $var.SubString(0,5) to return the first 5 characters of $var.
Methods - ToUpper(), PadRight(), Split(), Substring(), Replace() etc.