How to convert string to integer in PowerShell

Question

I have a list of directories with numbers. I have to find the highest number and and increment it by 1 and create a new directory with that increment value. I am able to sort the below array, but I am not able to increment the last element as it is a string.

How do I convert this below array element to an integer?

PS C:\Users\Suman\Desktop> $FileList  Name ---- 11 2 1 

Answer 1

You can specify the type of a variable before it to force its type. It's called (dynamic) casting (more information is here):

$string = "1654" $integer = [int]$string  $string + 1 # Outputs 16541  $integer + 1 # Outputs 1655 

---

As an example, the following snippet adds, to each object in $fileList, an IntVal property with the integer value of the Name property, then sorts $fileList on this new property (the default is ascending), takes the last (highest IntVal) object's IntVal value, increments it and finally creates a folder named after it:

# For testing purposes #$fileList = @([PSCustomObject]@{ Name = "11" }, [PSCustomObject]@{ Name = "2" }, [PSCustomObject]@{ Name = "1" }) # OR #$fileList = New-Object -TypeName System.Collections.ArrayList #$fileList.AddRange(@([PSCustomObject]@{ Name = "11" }, [PSCustomObject]@{ Name = "2" }, [PSCustomObject]@{ Name = "1" })) | Out-Null  $highest = $fileList |     Select-Object *, @{ n = "IntVal"; e = { [int]($_.Name) } } |     Sort-Object IntVal |     Select-Object -Last 1  $newName = $highest.IntVal + 1  New-Item $newName -ItemType Directory 

Sort-Object IntVal is not needed so you can remove it if you prefer.

[int]::MaxValue = 2147483647 so you need to use the [long] type beyond this value ([long]::MaxValue = 9223372036854775807).

Answer 2

Example:

2.032 MB (2,131,022 bytes)

$u=($mbox.TotalItemSize.value).tostring()  $u=$u.trimend(" bytes)") #yields 2.032 MB (2,131,022  $u=$u.Split("(") #yields `$u[1]` as 2,131,022  $uI=[int]$u[1] 

The result is 2131022 in integer form.