ForEach loop in PowerShell - Step-by-Step Execution

Concept Flow - ForEach loop

Start with collection

↓

Pick next item

↓

Execute loop body with item

↓

More items?

No→Exit loop

↩Back to Pick next item

The ForEach loop picks each item from a collection one by one, runs the loop body using that item, and repeats until all items are processed.

Execution Sample

PowerShell

foreach ($item in 1..3) {
  Write-Output "Item: $item"
}

This loop prints each number from 1 to 3 on its own line.

Execution Table

Iteration	Variable $item	Condition	Action	Output
1	1	1 in collection? Yes	Print 'Item: 1'	Item: 1
2	2	2 in collection? Yes	Print 'Item: 2'	Item: 2
3	3	3 in collection? Yes	Print 'Item: 3'	Item: 3
4	N/A	No more items	Exit loop

💡 All items processed, no more items in collection

Variable Tracker

Variable	Start	After 1	After 2	After 3	Final
$item	undefined	1	2	3	3

Key Moments - 2 Insights

What is the value of $item after the loop ends?

After the loop finishes (see execution_table row 4), $item retains the last value (3) because the loop variable persists in the current scope.

Does the loop run if the collection is empty?

No, the loop checks for items before running. If the collection is empty, it exits immediately (like row 4).

Visual Quiz - 3 Questions

Look at the execution table, what is the value of $item during iteration 2?

A 1

B 2

C 3

D undefined

💡 Hint

Check the 'Variable $item' column at iteration 2 in the execution_table.

At which iteration does the loop stop running?

A After iteration 2

B After iteration 4

C After iteration 3

D It never stops

💡 Hint

Look at the exit_note and the last row in execution_table.

If the collection was empty, how would the execution_table change?

A It would have only one row showing exit immediately

B It would have multiple rows with $item values

C It would print items anyway

D It would cause an error

💡 Hint

Refer to key_moments about empty collections and execution_table exit behavior.

Concept Snapshot

ForEach loop syntax:
foreach ($item in collection) {
  # code using $item
}

It runs the code block once for each item in the collection.
When no items remain, the loop ends.
$item holds the current item during each iteration.

Full Transcript

The ForEach loop in PowerShell takes each item from a list or collection one by one. For each item, it runs the code inside the loop using that item. When all items are done, the loop stops. In the example, numbers 1 to 3 are printed one by one. The variable $item changes each time to the current number. After the loop ends, $item retains the last value (3). If the collection is empty, the loop does not run at all.