PowerShell Switch Statement

Besides you can use if statement to evaluate multiple conditions, you can also use switch statement. The switch statement list each condition and optional action. When a condition is met, the action is performed.

Basic switch syntax:

Switch (condition) 

{

    <condition>  : {action}

    <condition>  : {action}

    <default>    : {action}

}

Let's review about if statement.

"======================"

"Day in a week : "

"Mon : Monday"

"Tue : Tuesday"

"Wed : Wednesday"

"Thu : Thursday"

"Fri : Friday"

"Sat : Saturday"

"Sun : Sunday"

"======================="

$input = Read-Host 'Your input (Mon, Tue, Wed, Thu, Fri, Sat, Sun)'

if ($input -eq 'Mon') {

    Write-Host ("It's Monday!")

} elseif ($input -eq 'Tue') {

    Write-Host ("It's Tuesday!")

} elseif ($input -eq 'Wed') {

    Write-Host ("It's Wednesday!")

} elseif ($input -eq 'Thu') {

    Write-Host ("It's Thursday!")

} elseif ($input -eq 'Fri') {

    Write-Host ("It's Friday!")

} elseif ($input -eq 'Sat') {

    Write-Host ("It's Saturday!")

} elseif ($input -eq 'Sun') {

    Write-Host ("It's Sunday!")

} else {

    Write-Host ("None of above!")

}

Instead of if statement here's what you can do with switch statement.

$input = Read-Host 'Your input (Mon, Tue, Wed, Thu, Fri, Sat, Sun)'

Switch ($input)

{

    "Mon" { Write-Host ("It's Monday!") }

    "Tue" { Write-Host ("It's Tuesday!") }

    "Wed" { Write-Host ("It's Wednesday!") }

    "Thu" { Write-Host ("It's Thursday!") }

    "Fri" { Write-Host ("It's Friday!") }

    "Sat" { Write-Host ("It's Saturday!") }

    "Sun" { Write-Host ("It's Sunday!") }

    default { Write-Host ("None of above!") }

}

You can also do this with switch.

Switch ($input = Read-Host 'Your input (Mon, Tue, Wed, Thu, Fri, Sat, Sun)')

{

    "Mon" { Write-Host ("It's Monday!") }

    "Tue" { Write-Host ("It's Tuesday!") }

    "Wed" { Write-Host ("It's Wednesday!") }

    "Thu" { Write-Host ("It's Thursday!") }

    "Fri" { Write-Host ("It's Friday!") }

    "Sat" { Write-Host ("It's Saturday!") }

    "Sun" { Write-Host ("It's Sunday!") }

    default { Write-Host ("None of above!") }

}

Like this too.

Write-Host ($result = switch($input = Read-Host 'Your input (Mon, Tue, Wed, Thu, Fri, Sat, Sun)') {

    "Mon" { "It's Monday!" }

    "Tue" { "It's Tuesday!" }

    "Wed" { "It's Wednesday!" }

    "Thu" { "It's Thursday!" }

    "Fri" { "It's Friday!" }

    "Sat" { "It's Saturday!" }

    "Sun" { "It's Sunday!" }

    default { "None of above!" }

})

Switch also can handles arrays, it will process each element in array collection.

$days = @('Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun')

Switch ($days) {

    "Mon" { "It's Monday!" }

    "Tue" { "It's Tuesday!" }

    "Wed" { "It's Wednesday!" }

    "Thu" { "It's Thursday!" }

    "Fri" { "It's Friday!" }

    "Sat" { "It's Saturday!" }

    "Sun" { "It's Sunday!" }

    default { "None of above!" }

}

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