PowerShell Operators

PowerShell's Operators

Operator	Definition
#	# The hash key is for comments
+	Add
-	Subtract
*	Multiply
/	Divide
%	Modulus (Some call it Modulo) - Means remainder 17 % 5 = 2 Remainder
=	equal
-not	logical not equal
!	logical not equal
-band	binary and
-bor	binary or
-bnot	binary not
-replace	Replace (e.g.  "abcde" –replace "b","B") (case insensitive)
-ireplace	Case-insensitive replace (e.g.  "abcde" –ireplace "B","3")
-creplace	Case-sensitive replace (e.g.  "abcde" –creplace "B","3")
-and	AND (e.g. ($a -ge 5 -AND $a -le 15) )
-or	OR  (e.g. ($a –eq "A" –OR $a –eq "B") )
-is	IS type (e.g. $a -is [int] )
-isnot	IS not type (e.g. $a -isnot [int] )
-as	convert to type (e.g. 1 -as [string] treats 1 as a string )
..	Range operator (e.g.  foreach ($i in 1..10) {$i }  )
&	call operator (e.g. $a = "Get-ChildItem" &$a executes Get-ChildItem)
. (dot followed by a space)	call operator (e.g. $a = "Get-ChildItem" . $a executes Get-ChildItem in the current scope)
.	.Period or .full stop for an objects properties $CompSys.TotalPhysicalMemory
-F	Format operator (e.g. foreach ($p in Get-Process) { "{0,-15} has {1,6} handles" –F  $p.processname,$p.Handlecount } )

PowerShell's Conditional or Comparison Operators

Operator	Definition
-lt	Less than
-le	Less than or equal to
-gt	Greater than
-ge	Greater than or equal to
-eq	Equal to
-ne	Not Equal to
-contains	Determine elements in a group.  This always returns Boolean $True or $False.
-notcontains	Determine excluded elements in a group This always returns Boolean $True or $False.
-like	Like - uses wildcards for pattern matching
-notlike	Not Like - uses wildcards for pattern matching
-match	Match - uses regular expressions for pattern matching
-notmatch	Not Match - uses regular expressions for pattern matching
	Bitwise
-band	Bitwise AND
-bor	Bitwise OR
-is	Is of Type
-isnot	Is not of Type
	Other Operators
if(condition)	If condition
elseIf(condition)	ElseIF
else(condition)	Else
>	Redirect, for example, output to text file Example   .\cmdlet > stuff.txt
>>	Same as Redirect except it appends to an existing file