While and Do-While loops in PowerShell - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is a While loop in PowerShell?

A While loop repeats a block of code as long as a specified condition is true. It checks the condition before running the code each time.

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How does a Do-While loop differ from a While loop?

A Do-While loop runs the code block first, then checks the condition. This means it always runs at least once, even if the condition is false at the start.

beginner

Write a simple PowerShell While loop that counts from 1 to 3.

$i = 1 while ($i -le 3) { Write-Output $i $i += 1 }

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What happens if the condition in a While loop is false at the start?

The code inside the While loop does not run at all because the condition is checked before the loop runs.

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Explain a real-life example of a Do-While loop.

Imagine you want to taste a soup and keep adding salt until it tastes right. You taste it first (run code), then decide if you need more salt (check condition). This is like a Do-While loop.

In PowerShell, when does a While loop check its condition?

A Before running the loop code

B After running the loop code

C Only once at the start

D It never checks a condition

A While loop checks the condition before running the code block each time.

Which loop guarantees the code runs at least once?

A While loop

B Do-While loop

C For loop

D None of the above

A Do-While loop runs the code first, then checks the condition, so it always runs at least once.

What will happen if the While loop condition is false at the start?

A The loop runs once

B The loop runs infinitely

C The loop runs twice

D The loop does not run

If the condition is false at the start, the While loop does not run at all.

Which symbol is used to increment a variable in PowerShell inside a loop?

A $i += 1

B ++$i

C All of the above

D $i++

$i += 1 is the standard and compatible way to increment a variable by 1 in PowerShell.

What is the main purpose of loops like While and Do-While?

A To write code faster

B To stop code from running

C To repeat code multiple times

D To create variables

Loops repeat a block of code multiple times based on a condition.

Describe how a While loop works in PowerShell and give a simple example.

Think about checking a rule before doing something repeatedly.

Explain the difference between While and Do-While loops with a real-life analogy.

Consider when you decide to repeat an action: before or after doing it once.