These below are standard comparison operators used in PowerShell.

Examples:

If ($Samples -eq "Scott"){
     Do Something
}

• -eq (Equal To)

• -ceq (for case-sensitive Compare)

• -ne (not equal to)

• -lt (less than)

• -le (less than or equal to)

• -gt (greater than)

• -ge (greater than or equal to)

• -like (like—a wildcard comparison)

• -notlike (not like—a wildcard comparison)

• -contains (contains the specified value)

• -notcontains (doesn't contain the specified value)

• -creplace (for case-sensitive replace)

 

#/////////////////////////// Array Replace \\\\\\\\\\\\\\\\\\\\\\\\\\\\\

$Array=@()

$Array=Get-aduser -filter * | Select -ExpandProperty Name

$Array -replace("Guest","Scott is an  awesome teacher")

​

#////////////////////////// String Replace \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\

$MyMainString = "I have alot of spare time to do videos"

$MyMainString=$MyMainString -replace("have","----------Does not Have----------") 

cls

$MyMainString

​

​

#/////////////////////// Array -Contains / -NotContains \\\\\\\\\\\\\\\\\\\\\

$Array=@()
$Array=Get-aduser -filter * | Select -ExpandProperty Name
$Array

If($Array -contains "Guest"){
    cls
    Write-Host "Account Name Found" 
}Else{
    cls
    Write-Host "Account match not found"
}

EVALUATE COMPARISON to get a Boolean return of is String or is DateTime...

• -is

• -isnot

​

Example:
$String1 = "I am a String"

if ($String1 -is [String]){
         Write-Host "Is a String"
}Else{
         write-Host "Is Not a String"
}

 

 

 

DataTypes used for comparison:

[string] Fixed-length string of Unicode characters
[char] A Unicode 16-bit character
[byte] An 8-bit unsigned character

[int] 32-bit signed integer
[long] 64-bit signed integer
[bool] Boolean True/False value

[decimal] A 128-bit decimal value
[single] Single-precision 32-bit floating point number
[double] Double-precision 64-bit floating point number
[DateTime] Date and Time

[xml] Xml object
[array] An array of values
[hashtable] Hashtable object

​

​

COMPARISON LOGICAL OPERATORS to be used for multiple checks on Boolean.

• -and

• -or

• -not

• !

​

Example:

$String1 = "I am a String"
$Number = 4

if (($String1 -is [String]) -and ($Number -is [Int])){
       Write-Host "Is a String and a Integer"
}Else{
      write-Host "Is Not a String or Not a Number"
}

My Output:
Is a String and a Integer