Variables

Variable Names Use Camel Case

Variable names should use camelCase.

Bad:

function Write-Log
{
    $VerboseMessage = 'New log message'
    Write-Verbose $VerboseMessage
}

Bad:

function Write-Log
{
    $verbosemessage = 'New log message'
    Write-Verbose $verbosemessage
}

Good:

function Write-Log
{
    $verboseMessage = 'New log message'
    Write-Verbose $verboseMessage
}

Script, Environment and Global Variable Names Include Scope

Script, environment, and global variables must always include their scope in the variable name unless the ‘using’ scope is needed. The script and global scope specifications should be all in lowercase. Script and global variable names following the scope should use camelCase.

Bad:

$fileCount = 0
$GLOBAL:MYRESOURCENAME = 'MyResource'

function New-File
{
    $fileCount++
    Write-Verbose -Message "Adding file to $MYRESOURCENAME to $ENV:COMPUTERNAME."
}

Good:

$script:fileCount = 0
$global:myResourceName = 'MyResource'

function New-File
{
    $script:fileCount++
    Write-Verbose -Message "Adding file to $global:myResourceName to $env:computerName."
}

Updated on 28 Jan 2019