Essential Books

Boolean values

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$true and $false are two variables that represent logical TRUE and FALSE.

Note that you have to specify the dollar sign as the first character (which is different from C#). 

$boolExpr = "abc".Length -eq 3 # length of "abc" is 3, hence $boolExpr will be True
if($boolExpr -eq $true){
    "Length is 3"
}
# result will be "Length is 3" 
$boolExpr -ne $true
#result will be False

Notice that when you use boolean true/false in your code you write $true or $false, but when Powershell returns a boolean, it looks like True or False

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Automatic variables:
* Automatic Variables
* OFS
*
* null
* error
* pid
* Boolean values
* PSItem
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