Mastering PowerShell from Beginner to Advanced Level

# arithmetic operators (+, -, *, /, %)

[int]$1stnumber = Read-host "Ente1r Ist number "

[int]$2ndnumber = Read-host "Enter 2nd number "

Write-Host "Sum of these Numbers is $($1stnumber + $2ndnumber)"

Write-Host "Multiplication of these Numbers is $($1stnumber * $2ndnumber)"

Write-Host "Result of this Division Operation is  $($1stnumber / $2ndnumber)"

Write-Host "Remainder this of Division Operation is $($1stnumber % $2ndnumber)"

## Arithmetic Operator with Strings

$1stSring = "Best"

$2ndString = "Test"

Write-Host "Sum of these Strings is $($1stSring + $2ndString)"

Write-Host "Multiplication of these Numbers is $($1stSring * 6)"

New-Item -Name $("Test_" + "File_" + (Date).DayOfWeek + ".txt")

######################## Assignment Operators

$MyNumber = 100

"Now my Number is $MyNumber"

$Mynumber += 50

"Now my Number is $MyNumber"

$Mynumber -= 50

"Now my Number is $MyNumber"

$Mynumber *= 50

"Now my Number is $MyNumber"

$Mynumber /= 50

"Now my Number is $MyNumber"

$Mynumber %= 50

"Now my Number is $MyNumber"

# Assignment Operators with Strings

$Value = "Test"

$Value

$Value += 2

$Value

$Value *= 2

$Value

## Comparison Operators - Equality Operators - In case of Single/Scaler Values

$X = 50

$Y = 100

If ($X -eq $Y)

{Write-Host "This condition is True"}

else

{Write-Host "This condition is False"}

If ($X -ne $Y)

{Write-Host "This condition is True"}

else

{Write-Host "This condition is False"}

If ($X -gt $Y)

{Write-Host "This condition is True"}

else

{Write-Host "This condition is False"}

If ($X -ge $Y)

{Write-Host "This condition is True"}

else

{Write-Host "This condition is False"}

If ($X -lt $Y)

{Write-Host "This condition is True"}

else

{Write-Host "This condition is False"}

If ($X -ge $Y)

{Write-Host "This condition is True"}

else

{Write-Host "This condition is False"}

## Comparison Operators - Equality Operators - In case of Collection

"Test", "best","test" -eq "test"

"Test", "best","test" -ne "test"

4,5,8,6,2,1 -gt 2

4,5,8,6,2,1 -lt 2

4,5,8,6,2,1 -ge 2

4,5,8,6,2,1 -le 2

## Comparision Operators - Matching Operators - In case of Scaler Values

"Test" -like "*test*"

"Test" -notlike "*test*"

Get-Service|Where-Object {$_.DisplayName -like "*Windows Update*"}

Get-Service|Where-Object {$_.DisplayName -notlike "*Windows Update*"}

"PowerShell" -match 'shell'

"PowerShell" -notmatch 'shell'

## Comparision Operators - Matching Operators - In case of Collection of Values

"Test", "best","test" -like "*test*"

"Test", "best","test" -notlike "*test*"

# Comparision Operators - Containment Operators

"Test", "Best", "Chest" -contains "Best"

"Test", "Best", "Chest" -notcontains "Best"

"Best" -in "Test", "Best", "Chest"

"Best" -notin "Test", "Best", "Chest"

# Comparison Operators - Replacement Operators

"Test Value" -replace 'Te', 'Be'

1..5|foreach {New-Item -Name $("file" + $_ + ".txt")}

Get-ChildItem *.txt | foreach {Rename-Item $_.Name -NewName $($_.name -replace '.txt','.log')}

Get-ChildItem *.txt | foreach {Rename-Item $_.Name -NewName $($_.name -replace '.log','.txt')}

# Comparison Operators - Type Operators

$A = 2

$A -is [int]

$A -isNOT [int]

# Logical Operators

(1 -eq 1) -and (1 -eq 2)

(1 -eq 1) -or (1 -eq 2)

(1 -eq 1) -xor (1 -eq 1)

!(1 -eq 1)

# Redirection Operators

ping fakehost

Ping fakehost > D:PSTrainingPracticeGroundRefile.txt

start "D:PSTrainingPracticeGroundRefile.txt"

Ping fakehost >> D:PSTrainingPracticeGroundRefile.txt

start "D:PSTrainingPracticeGroundRefile.txt"

# Split Operator

-split "This is a,test"

"This,is,a,test" -split ","

"This,is,a,test" -split "(,)"

"apple,Orange;mango" -split "[,;]"

"This,is,a,test" -split "(,)",2

# Join Operator

-join ("This","is","join","example")

("This","is","join","example") -join  " "

## Unary Operator

$number = 100

$number

$number++

$number

++$number

$number

$number--

$number

--$number

$number

##### Special Operator - Grouping Operator

4+4/2

(4+4)/2

(Get-Service).DisplayName[2]

(Get-Service).count

## Special Operator - Subexpression Operator $()

"My OS get updated using Service $((Get-Service |Where {$_.displayname -like "Win*date"}).Displayname)"

## Special Operator - Call Operator

$command = Read-Host "Write Command That you want to run"

$command

& $command # Running Command Stored as String in a Variable

new-item d:PsTrainingPracticeGroundScript1.ps1

Set-Content d:PsTrainingPracticeGroundScript1.ps1 -Value "Get-Service"

"d:PsTrainingPracticeGroundScript1.ps1"

& "d:PsTrainingPracticeGroundScript1.ps1" # Running Script by getting Name of Script as String

## Special Operator - Comma Operator

$list = "a","b","c"

$list

## Special Operator - Index Operator

$list

$list[2]

## Special Operator - Pipeline Operator

Get-Service|where-object {$_.DisplayName -like "*Win*date*"}

## Special Operator - Range Operator

1..6

1..6|foreach {Write-Host This is line $_}

## Special Operator - Member Access Operator

(Get-Service).DisplayName