Snippet ::: Get User Confirmation

Use this code to get Yes/No confirmation from the user.
Two flavors: Asking once or until valid option is typed.

Core Snippets

Get user confirmation - asking once

# Snippet ::: Get User Confirmation -_-
# PowerShellExamples.com

# Get User Confirmation - asking once -_-
Write-Host "Are you Sure You Want To Proceed?:" -ForegroundColor Yellow
$confirmation = Read-Host "Y(es)/N(o):"

switch -regex ($confirmation.ToLower())
{
    "^y(es)?$" { $proceed = $true }
    "^n(o)?$" { $proceed = $false }
    default { $proceed = $null }
}

# take action from response -_-
if([string]::IsNullOrEmpty($proceed)){
    Write-Host "Selected Option - $confirmation - is not valid"
}else{
    if($proceed){
        Write-Host "Proceed."
    }else{
        Write-Host "Cancel Operation"
    }
}

Get user confirmation - Until valid option is selected

# Snippet ::: Get User Confirmation -_-
# PowerShellExamples.com

# Get User Confirmation - Until valid option is selected -_-
do {
    Write-Host "Are you Sure You Want To Proceed?:" -ForegroundColor Yellow
    $confirmation = Read-Host "Y(es)/N(o):"

    switch -regex ($confirmation.ToLower())
    {
        "^y(es)?$" { $proceed = $true }
        "^n(o)?$" { $proceed = $false }
        default { 
            write-host "Option not valid. Try again" -ForegroundColor red
            $proceed = $null 
        }
    }

} while ($proceed -eq $null)

# take action from response -_-
if([string]::IsNullOrEmpty($proceed)){
    Write-Host "Selected Option - $confirmation - is not valid"
}else{
    if($proceed){
        Write-Host "Proceed."
    }else{
        Write-Host "Cancel Operation"
    }
}

Practical Sample

# Sample : Scripting ::: Force Variable Declaration -_-
# PowerShellExamples.com

# Get User Confirmation - asking once -_-

# Get User info
Write-Host "Are you Sure You Want To Proceed?:" -ForegroundColor Yellow
$confirmation = Read-Host "Y(es)/N(o):"

# Evaluate response
switch -regex ($confirmation.ToLower())
{
    "^y(es)?$" { $proceed = $true }
    "^n(o)?$" { $proceed = $false }
    default { $proceed = $null }
}

# take action from response -_-
if([string]::IsNullOrEmpty($proceed)){
    Write-Host "Selected Option - $confirmation - is not valid"
}else{
    if($proceed){
        Write-Host "Proceed."
    }else{
        Write-Host "Cancel Operation"
    }
}

Result

PS C:\> 

Are you Sure You Want To Proceed?:
Y(es)/N(o):: Yes
Proceed.