PowerShell get the same Read-Host if wrong input

Question

I'm struggling with to get the same Read-Host if the user put in an invalid input. I have tried many different solution but can't get it to work.

My example is a simple yes/no script. But I want it to give me the Read-Host again if it's not ja/nej. I'ts also okay to get a more universal solution, like if wrong input tray again kind of way.

Write-Host "Er du født før 1. januar 2000?";
$Readhost = Read-Host "ja/nej"
switch ($Readhost)
{
ja {write-host "Så er du over 18 år gammel"}
nej {write-host "Så er du yngere end 18 år"}
default {write-host ”Svar på spørgsmålet!”}
}

gvee · Accepted Answer · 2018-11-09 09:46:45Z

3

You need a while loop!

Write-Host "Er du født før 1. januar 2000?";
$Readhost = ""

while ($Readhost -notin "ja", "nej") {
    $Readhost = Read-Host "ja/nej"

    switch($Readhost) {
        ja {write-host "Så er du over 18 år gammel"}
        nej {write-host "Så er du yngere end 18 år"}
    } 
}

answered Nov 9, 2018 at 9:46

gvee

17.2k42 silver badges50 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

user6811411 Over a year ago

I'd keep the default to inform the user why asking again.

boxdog · Accepted Answer · 2018-11-09 10:12:09Z

0

If you have a pre-defined set of options like "yes/no", then consider using a menu to avoid invalid input. For example:

$selectedFruit = $host.UI.PromptForChoice('Select a Fruit', "Which fruit is your favorite?", ('&Apple', '&Melon', 'Man&go','&Quit'), 0)

switch($selectedFruit)
{
    0 {Write-Host "You chose 'Apple'"}
    1 {Write-Host "You chose 'Melon'"}
    2 {Write-Host "You chose 'Mango'"}
}

In the console, this produces a menu like this:

As you can see it will continue to prompt the user if they enter an incorrect value (or select the Quit option). If you don't want a default value, change the 0 in PromptForChoice to -1.

answered Nov 9, 2018 at 10:12

boxdog

8,5023 gold badges22 silver badges30 bronze badges

Collectives™ on Stack Overflow

PowerShell get the same Read-Host if wrong input

2 Answers 2

1 Comment

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

1 Comment

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related