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PowerShell

179 problems12 sections📅 2026 curriculum

Learn PowerShell by typing real, object-based code.

Practice PowerShell's object pipeline by typing it: cmdlets with verb-noun names, piping objects (not text) between them, filtering with Where-Object, and shaping output with Select-Object. Each snippet is idiomatic PowerShell, and an AI tutor explains every line — why the pipeline passes objects, how a property survives the pipe — so Windows automation clicks as your typing speeds up.

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Run PowerShell on your machine

1. Install the toolchain

brew install powershell # or see docs

2. Save your code as script.ps1, then compile & run

pwsh script.ps1

Official install docs ↗

progress by section

1Fundamentals0/16start →

Booleans Comments Variables Write-Output and Write-Host Arithmetic Comparison operators String interpolation Read-Host Casting strings to numbers The null value Typed variables Verb-Noun cmdlets The $args array Get-Member Here-strings The pipeline variable

2Strings In Depth0/16start →

Upper and lower case Length Concatenation Interpolation vs literal Replace method Trim Contains and -like IndexOf The -join operator PadLeft Split method Substring The -f format operator The -split operator -match and -replace -split with a limit

3Text Processing0/14start →

-join an array String multiplication ToUpper and ToLower Contains and -like The -f format operator -split a string Trim and PadLeft Here-strings -replace with regex Char and codepoint ConvertFrom-Csv / ConvertTo-Csv -match and $matches Select-String (grep-like)[regex]::Matches

4File I/O0/14Unlock →

Add-Content appends Write an array of lines Read lines and count Out-File from a pipeline Remove-Item safely Set-Content then Get-Content Test-Path before you act Head and tail of a file $PSScriptRoot for relative paths Read the whole file (-Raw)Round-trip through a temp file Export-Csv and Import-Csv JSON to a file and back Stream with -ReadCount

5Networking0/18Unlock →

Invoke-WebRequest Invoke-RestMethod GET Test-NetConnection Download a file Check your public IP Resolve-DnsName Get-NetIPAddress and Get-NetRoute Set a User-Agent Invoke-RestMethod POST Get-NetTCPConnection Follow (or stop) redirects JSON round-trip Basic auth and bearer tokens Use an HTTP proxy Retry logic TcpClient port test A small REST wrapper Parallel requests

6Commands0/15Unlock →

Write-Output Environment variables Get-Location $args (unnamed arguments)Capture command output List env: variables Set an exit code Get-Command Pipe into a command Invoke an external command Measure-Command (timing)param() for script args $LASTEXITCODE Start-Process Invoke-Expression (use sparingly)

7Conditionals0/14Unlock →

Comparison operators if / elseif / else Null check Null coalescing ?? (PS7)-like wildcard match Logical -and -or -not String emptiness test switch statement Ternary operator (PS7)Test-Path guard Case sensitivity -in and -contains -match regex test switch -Wildcard / -Regex

8Loops0/14Unlock →

for loop foreach over a list Ranges 1..5 while loop break continue do-until loop do-while loop ForEach-Object pipeline Loop over a file's lines Loop over a hashtable Loop with an index Nested loops .ForEach() method

9Functions0/14Unlock →

Calling a function Function definition Default parameter values param() block Typed parameters Multiple typed parameters Named vs positional args Implicit output vs return Switch parameter Mandatory parameter Pipeline input begin / process / end [CmdletBinding()] advanced function Splatting @params

10Arrays0/16Unlock →

Count Array literal Iterating with foreach Indexing Ranges Appending with +=-contains and -in Hashtable access Hashtables Keys and Values Sorting Iterating a hashtable Ordered hashtable Slicing Unique values ArrayList

11Pipelines0/14Unlock →

A basic pipeline ForEach-Object Select-Object properties Sort-Object Where-Object filter $_ the current object Measure-Object Top-N with -First && and || chain operators Group-Object ConvertTo-Json at the end A multi-stage pipeline Calculated property Tee-Object

12Objects0/14Unlock →

Accessing properties PSCustomObject Select-Object properties Sort-Object Where-Object filter Get-Member Group-Object Measure-Object ForEach-Object -MemberName Add-Member Calculated properties Compare-Object ConvertTo-Json / ConvertFrom-Json .PSObject.Properties