linux - Multiple directories: Powershell equivalent of "mkdir dir{1..9}"?

What is the syntax to create multiple directories with PowerShells md (or mkdir, New-Item...) equivalent to the 'nix command mkdir ch{1..9} i.e.

~/parent_dir/  
ch1/  
ch2/  
ch3/  
ch4/  
ch5/  
ch6/  
ch7/  
ch8/  
ch9/  

I've looked in the man pages and get-help for examples, but I do not know the syntax for PowerShell to do such a simple thing. Thank you.

Answer

What is the syntax to create multiple directories with PowerShell

Use the following command:

0..9 | foreach $_{ New-Item -ItemType directory -Name $("ch" + $_) }

How it works:

• 0..9 the range operator .. generates the sequence of numbers 0, 1, ... 9


• the numbers are pipelined | to the next command


• foreach loops (through each number in turn)


• { ... } is a script block


• New-Item -ItemType directory -Name $("ch" + $_) creates the directories


• $_ is an automatic variable that represents the current object in the pipeline (the number)

Example:

> 0..9 | foreach $_{ New-Item -ItemType directory -Name $("ch" + $_) }


    Directory: F:\test


Mode                LastWriteTime         Length Name
----                -------------         ------ ----
d-----       25/09/2016     14:57                ch0
d-----       25/09/2016     14:57                ch1
d-----       25/09/2016     14:57                ch2
d-----       25/09/2016     14:57                ch3
d-----       25/09/2016     14:57                ch4
d-----       25/09/2016     14:57                ch5
d-----       25/09/2016     14:57                ch6
d-----       25/09/2016     14:57                ch7
d-----       25/09/2016     14:57                ch8
d-----       25/09/2016     14:57                ch9