Version differences

Version differences Version differences

Differences between PowerShell 7 and Windows PowerShell 5.1

  • PowerShell 7 has new character codes for Escape and any Unicode character

  • PowerShell 7 has enhanced support for ANSI escape sequence handling in the console

  • PowerShell 7 has several new cmdlets that aren’t available in Windows PowerShell 5.1

    • ConvertFrom-Markdown, Show-Markdown
    • Get-Error
    • Get-Uptime
    • Remove-Alias
    • Remove-Service
  • PowerShell 7 is missing several cmdlets that are available in Windows PowerShell 5.1

    • WMI cmdlets (Use the CimCmdlets instead)
      • Get-WmiObject
      • Invoke-WmiMethod
      • Register-WmiEvent
      • Remove-WmiObject
      • Set-WmiInstance
    • The Workflow cmdlets
      • Invoke-AsWorkflow
      • New-PSWorkflowSession
      • New-PSWorkflowExecutionOption
  • The behavior of some cmdlets has changed in PowerShell 7

    For example, the Invoke-RestMethod cmdlet has 4 parameter sets and 53 parameters in PowerShell 7.

    1
    2
    3
    4
    5
    6
    
    PS> $PSVersionTable.PSVersion.ToString()
    7.3.6
    PS> (Get-Command Invoke-RestMethod).ParameterSets.Count
    4
    PS> (Get-Command Invoke-RestMethod).Parameters.Count
    53

    The same command in Windows PowerShell has 1 parameter set and 34 parameters.

    1
    2
    3
    4
    5
    6
    
    PS> $PSVersionTable.PSVersion.ToString()
    5.1.22621.1778
    PS> (Get-Command Invoke-RestMethod).ParameterSets.Count
    1
    PS> (Get-Command Invoke-RestMethod).Parameters.Count
    34
  • PowerShell 7 has new experimental features

  • PowerShell 7 has new operators that aren’t available in Windows PowerShell 5.1

     1
     2
     3
     4
     5
     6
     7
     8
     9
    10
    11
    12
    13
    14
    15
    16
    17
    18
    19
    20
    21
    
    # Chain operators
    
    # Stop the notepad process if it's running
    Get-Process notepad && Stop-Process -Name notepad
    
    # Start notepad if it's not running
    Get-Process notepad || notepad
    
    # Ternary operator ? <if-true> : <if-false>
    (Test-Path $PROFILE) ? "Path exists" : "Path not found"
    (Test-Path $PROFILE.AllUsersAllHosts) ? "Path exists" : "Path not found"
    
    # Null coalesing operator ?? <if-null>
    # Return the right side value if the left side is null
    
    PS> $startDate = $null
    PS> $startDate ?? (Get-Date).ToShortDateString()
    8/30/2023
    PS> $startDate = '1/10/2020'
    PS> $startDate ?? (Get-Date).ToShortDateString()
    1/10/2020
  • PowerShell 7 has defaults to UTF-8 encoding for all output