ForEach loop in PowerShell - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is a ForEach loop in PowerShell?

A ForEach loop in PowerShell repeats a block of code for each item in a collection, like going through a list one by one.

beginner

How do you write a basic ForEach loop in PowerShell to print each item in a list?

Use:

foreach ($item in $list) { Write-Output $item }

This runs the code inside the braces for every item in $list.

beginner

What does $item represent inside a ForEach loop?

$item is a variable that holds the current element from the list during each loop cycle.

intermediate

Can you use a ForEach loop to process objects, not just simple values?

Yes! ForEach loops can handle any collection, including objects, letting you access properties of each object inside the loop.

beginner

What happens if the collection in a ForEach loop is empty?

The loop body does not run at all because there are no items to process.

What keyword starts a ForEach loop in PowerShell?

A repeat

B for

C loop

D foreach

The keyword 'foreach' is used to start a ForEach loop in PowerShell.

In the loop foreach ($item in $list) { ... }, what is $list?

A The current item

B The collection of items to loop through

C A command

D A function

$list is the collection of items that the loop will go through one by one.

What will this code output?<br>

$numbers = 1,2,3<br>foreach ($n in $numbers) { Write-Output $n }

A 123

B Error

C 1 2 3 (each on a new line)

D Nothing

The loop prints each number on its own line: 1, then 2, then 3.

If the collection is empty, how many times does the ForEach loop run?

A Zero times

B Once

C Infinite times

D Depends on the code

If there are no items, the loop does not run at all.

Which of these can you loop over with a ForEach loop in PowerShell?

A All of the above

B An array of objects

C A collection of numbers

D A list of strings

ForEach loops work with any collection, including strings, objects, and numbers.

Explain how a ForEach loop works in PowerShell and give a simple example.

Think about how you would tell a friend to repeat an action for each item in a list.

Describe what happens inside the loop variable during each iteration of a ForEach loop.

Imagine picking one item at a time from a basket and doing something with it.