Operators and expressions – Arithmetic, assignment, comparison, pattern matching logical and bit wise operators
PowerShell includes the following comparison operators:
| Operator Type | Operators | Description |
|---|---|---|
| Equality | -eq-ne-gt-ge-lt-le | equals not equals greater than greater than or equal less than less than or equal |
| Matching | -like-notlike-match-notmatch | Returns true when string matches wildcard pattern Returns true when string does not match wildcard pattern Returns true when string matches regex pattern – $matches contains matching strings Returns true when string does not match regex pattern – $matches contains matching strings |
| Containment | -contains-notcontains-in-notin | Returns true when reference value contained in a collection Returns true when reference value not contained in a collection Returns true when test value contained in a collection Returns true when test value not contained in a collection |
| Replacement | -replace | replace a string pattern |
| Type comparison | -is-isnot | Returns true if both object are the same type Returns true if the objects are not the same type |
Examples:
Equality Operators:
PS C:\> 2 -eq 2 True PS C:\> 2 -eq 3 False PS C:\> 2 -ne 3 True PS C:\> 2 -ne 2 False
PowerShell operators are by default not case sensitive.
PS C:> "PowerShell" -eq "PowerShell" True PS C:> "PowerShell" -eq "POWERSHELL" True
If you want to make case sensitive, then we have to use -ceq.
PS C:> "PowerShell" -ceq "POWERSHELL" False PS C:> 10 -gt 10 False PS C:> 10 -gt 11 False PS C:> 100 -gt 10 True PS C:> 10 -gt 100 False PS C:> 10 -ge 10 True PS C:> 100 -ge 10 True PS C:> 10 -lt 100 True PS C:> 100 -lt 10 False PS C:> 10 -le 100 True PS C:> 100 -le 10 False PS C:>
Matching Operators:
PS C:\> "WindowsServer2012" -like "Windows" False PS C:\> "WindowsServer2012" -like "Windows*" True PS C:\> "WindowsServer2012" -like "*Server2012" True PS C:\> "WindowsServer2012" -like "*Server*" True PS C:\> "WindowsServer2012" -match "Server" True PS C:\> "WindowsServer2012" -match "2012" True PS C:\> "WindowsServer2012" -match "Windows" True PS C:\> "WindowsServer2012" -cmatch "Windows" True PS C:\> "WindowsServer2012" -cmatch "WINDOWS" False PS C:\> "WindowsServer2012" -notmatch "WINDOWS" False PS C:\> "WindowsServer2012" -cnotmatch "WINDOWS" True
Containment Operators:
PS C:\> "abc", "def" -Contains "def" True PS C:\> "Windows", "PowerShell" -Contains "Shell" False PS C:\> "Windows", "PowerShell" -Contains "*Shell" False
Replacement:
PS C:\> $a = "Windows Server 2012" PS C:\> $a -replace "2012","2016" Windows Server 2016
Type Comparison:
PS C:\> 123 -is [int] True PS C:\> "Red" -is [string] True PS C:\> $a = 1,2,3,4,5 PS C:\> $a -is [array] True
