Function definition in PowerShell - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is a function in PowerShell?

A function is a named block of code that performs a specific task and can be reused multiple times in a script.

beginner

How do you define a simple function named SayHello in PowerShell?

Use the syntax:<br>

function SayHello {
  Write-Output "Hello!"
}

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What keyword starts a function definition in PowerShell?

The keyword function is used to start defining a function.

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How can you call or run a function named SayHello after defining it?

Simply type the function name:<br>

SayHello

This runs the code inside the function.

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Why use functions in scripts?

Functions help organize code, avoid repetition, and make scripts easier to read and maintain.

Which keyword is used to define a function in PowerShell?

A def

B function

C func

D sub

In PowerShell, the keyword to define a function is 'function'.

How do you call a function named GetDate in PowerShell?

A call GetDate()

B run GetDate

C GetDate

D execute GetDate()

You call a function by typing its name alone, like 'GetDate'. Parentheses are optional and usually omitted.

What does the following function do?<br>

function Greet { Write-Output "Hi!" }

A Prints 'Hi!' when called

B Defines a variable named Greet

C Deletes the string 'Hi!'

D Creates a file named Greet

The function named Greet outputs the text 'Hi!' when you run it.

Why should you use functions in your scripts?

A To repeat code multiple times

B To slow down the script

C To make the script longer

D To organize and reuse code easily

Functions help organize code and let you reuse it without rewriting.

Which of these is a correct function definition in PowerShell?

A function Hello { Write-Output "Hello" }

B def Hello() { echo "Hello" }

C func Hello() { print "Hello" }

D sub Hello { Write "Hello" }

Only option A uses correct PowerShell syntax for defining a function.

Explain how to define and call a simple function in PowerShell.

Think about the keywords and how you run the function after defining it.

Describe why functions are useful in scripting with PowerShell.

Consider how functions help when scripts get bigger.