Arrays in PowerShell - Mini Project: Build & Apply

Working with Arrays in PowerShell

📖 Scenario: You are organizing a small event and need to manage a list of guest names using PowerShell arrays.

🎯 Goal: Build a PowerShell script that creates an array of guest names, adds a new guest, filters guests whose names start with a specific letter, and then displays the filtered list.

📋 What You'll Learn

Create an array with exact guest names

Add a new guest name to the array

Filter the array for names starting with a specific letter

Print the filtered list of guest names

💡 Why This Matters

🌍 Real World

Managing lists of items like guest names, file names, or tasks is common in automation scripts.

💼 Career

Knowing how to work with arrays and filter data is essential for system administrators and automation engineers.

1

Create the initial array of guest names

Create an array called guests with these exact names: "Alice", "Bob", "Charlie", "Diana", and "Ethan".

PowerShell

# Create the array called guests with the exact names
# Your code here

Need a hint?

Use @() to create an array and separate names with commas.

2

Add a new guest name to the array

Add the guest name "Fiona" to the existing guests array using the += operator.

PowerShell

$guests = @("Alice", "Bob", "Charlie", "Diana", "Ethan")
# Add "Fiona" to the guests array
# Your code here

Need a hint?

Use $guests += "Fiona" to add a new item to the array.

3

Filter guests whose names start with the letter 'C'

Create a new array called filteredGuests that contains only the names from guests starting with the letter 'C'. Use the Where-Object cmdlet with a script block checking if the name starts with 'C'.

PowerShell

$guests = @("Alice", "Bob", "Charlie", "Diana", "Ethan")
$guests += "Fiona"
# Filter guests starting with 'C' into filteredGuests
# Your code here

Need a hint?

Use Where-Object { $_.StartsWith('C') } to filter names starting with 'C'.

4

Display the filtered guest names

Print the contents of the filteredGuests array using Write-Output.

PowerShell

$guests = @("Alice", "Bob", "Charlie", "Diana", "Ethan")
$guests += "Fiona"
$filteredGuests = $guests | Where-Object { $_.StartsWith('C') }
# Print the filteredGuests array
# Your code here

Need a hint?

Use Write-Output $filteredGuests to display the filtered names.