Function definition in PowerShell - Mini Project: Build & Apply

Function definition

📖 Scenario: You are automating a simple task to greet users by name. Instead of writing the greeting multiple times, you want to create a reusable function that prints a greeting message.

🎯 Goal: Create a PowerShell function called Say-Hello that takes a single parameter Name and prints Hello, Name! when called.

📋 What You'll Learn

Create a function named Say-Hello

The function must accept one parameter called Name

The function should print the greeting message Hello, Name! using the parameter

Call the function with the argument World to display Hello, World!

💡 Why This Matters

🌍 Real World

Functions help automate repetitive tasks by packaging code into reusable blocks. This saves time and reduces errors.

💼 Career

Knowing how to write and use functions is essential for scripting jobs, system administration, and automation roles.

1

Create the function skeleton

Write a PowerShell function named Say-Hello with no parameters yet. Just create the function block with empty braces.

PowerShell

function Say-Hello {
    # Your code here
}

Need a hint?

Use the function keyword followed by the function name and curly braces.

2

Add a parameter to the function

Inside the Say-Hello function, add a parameter block with one parameter named Name.

PowerShell

function Say-Hello {
    param(
        # Your code here
    )
}

Need a hint?

Use param( [string]$Name ) inside the function to declare the parameter.

3

Add the greeting message inside the function

Inside the Say-Hello function, add a line that prints Hello, Name! using the $Name parameter with Write-Host and string interpolation.

PowerShell

function Say-Hello {
    param(
        [string]$Name
    )
    # Your code here
}

Need a hint?

Use Write-Host "Hello, $Name!" to print the greeting.

4

Call the function to display the greeting

Call the Say-Hello function with the argument World to print Hello, World!.

PowerShell

function Say-Hello {
    param(
        [string]$Name
    )
    Write-Host "Hello, $Name!"
}

# Your code here

Need a hint?

Simply write Say-Hello World to call the function with World.