Break and continue in PowerShell - Cheat Sheet & Quick Revision

Recall & Review

beginner

What does the break statement do in a PowerShell loop?

The break statement immediately stops the entire loop and exits it, continuing with the code after the loop.

beginner

What is the purpose of the continue statement in PowerShell loops?

The continue statement skips the rest of the current loop iteration and moves to the next iteration of the loop.

beginner

How does break differ from continue in PowerShell loops?

break stops the whole loop immediately, while continue skips only the current iteration and continues looping.

beginner

Example: What will this PowerShell code output?

for ($i=1; $i -le 5; $i++) { if ($i -eq 3) { break } Write-Output $i }

It will output:
1
2
Because when $i equals 3, break stops the loop immediately.

beginner

Example: What will this PowerShell code output?

for ($i=1; $i -le 5; $i++) { if ($i -eq 3) { continue } Write-Output $i }

It will output:
1
2
4
5
Because when $i equals 3, continue skips that iteration and moves to the next one.

What happens when break is used inside a PowerShell loop?

A Nothing happens, loop runs normally.

B The current iteration is skipped, loop continues.

C The loop restarts from the beginning.

D The loop stops immediately and exits.

break stops the entire loop immediately and exits it.

What does continue do in a PowerShell loop?

A Stops the loop completely.

B Skips the rest of the current iteration and continues with the next.

C Restarts the loop from the first iteration.

D Ends the script.

continue skips the rest of the current loop iteration and moves to the next one.

Which statement would you use to skip printing number 3 but continue the loop in PowerShell?

A continue

B exit

C break

D stop

continue skips the current iteration but keeps the loop running.

If you want to stop a loop as soon as a condition is met, which statement is best?

A break

B continue

C return

D exit

break immediately stops the loop when the condition is met.

What will this code output?

for ($i=1; $i -le 4; $i++) { if ($i -eq 2) { continue } Write-Output $i }

A 1 2 3 4

B 2 3 4

C 1 3 4

D 1 2 4

When $i equals 2, continue skips printing 2, so output is 1 3 4.

Explain in your own words how break and continue control the flow inside PowerShell loops.

Think about what happens when you want to stop everything vs just skip one step.

Write a simple PowerShell loop that prints numbers 1 to 5 but skips number 3 using continue.

Use an if statement inside the loop to check for 3 and skip it.

Practice

1. What does the break statement do inside a PowerShell loop?

easy

A. Stops the loop immediately and exits it

B. Skips the current iteration and continues with the next

C. Restarts the loop from the beginning

D. Pauses the loop until a condition is met

Solution

1. Step 1: Understand the purpose of break

   The break statement is used to exit a loop immediately, no matter where it is in the loop.

2. Step 2: Compare with other options

   continue skips to the next iteration, but break stops the loop entirely.

3. Final Answer:

   Stops the loop immediately and exits it -> Option A

4. Quick Check:

   break stops loop [OK]

Hint: Remember: break = stop loop, continue = skip iteration [OK]

Common Mistakes:

• Confusing break with continue
• Thinking break skips iteration instead of stopping
• Assuming break restarts the loop

2. Which of the following is the correct syntax to skip the current iteration in a PowerShell foreach loop?

easy

A. skip

B. continue

C. break

D. next

Solution

1. Step 1: Identify the keyword to skip iteration

   In PowerShell, continue is the keyword used to skip the current iteration and move to the next one.

2. Step 2: Verify other options

   break stops the loop, skip and next are not valid PowerShell keywords for this purpose.

3. Final Answer:

   continue -> Option B

4. Quick Check:

   continue skips iteration [OK]

Hint: Use continue to skip iteration, break to stop loop [OK]

Common Mistakes:

• Using break instead of continue
• Using non-existent keywords like skip or next
• Confusing syntax with other languages

3. What will be the output of this PowerShell script?

foreach ($i in 1..5) {
  if ($i -eq 3) { continue }
  if ($i -eq 5) { break }
  Write-Output $i
}

medium

A. 1 2 4

B. 1 2 3 4

C. 1 2 4 5

D. 1 2

Solution

1. Step 1: Analyze loop iterations and conditions

   Loop runs from 1 to 5. When $i is 3, continue skips output. When $i is 5, break stops loop before output.

2. Step 2: Determine output values

   Outputs are for $i = 1, 2, and 4 only. 3 is skipped, 5 stops loop before output.

3. Final Answer:

   1 2 4 -> Option A

4. Quick Check:

   continue skips 3, break stops before 5 [OK]

Hint: Trace loop step-by-step, watch continue and break effects [OK]

Common Mistakes:

• Including 3 in output despite continue
• Including 5 in output despite break
• Confusing continue and break effects

4. Identify the error in this PowerShell script snippet:

foreach ($num in 1..4) {
  if ($num -eq 2) {
    continue
  }
  elseif ($num -eq 3) {
    break
  }
  Write-Output $num
}

medium

A. The Write-Output is unreachable for $num = 3

B. The break statement should be outside the loop

C. No error; script runs as expected

D. The continue statement is used incorrectly

Solution

1. Step 1: Review the use of continue and break

   continue correctly skips output when $num is 2. break stops loop when $num is 3.

2. Step 2: Check output and flow

   Output will be 1 only. No syntax or logic errors present.

3. Final Answer:

   No error; script runs as expected -> Option C

4. Quick Check:

   continue and break used correctly [OK]

Hint: Check if continue/break are inside loop and reachable [OK]

Common Mistakes:

• Thinking break must be outside loop
• Assuming continue causes error
• Confusing unreachable code with error

5. You want to process numbers 1 to 10 but skip all even numbers and stop processing once you reach a number greater than 7. Which script correctly uses break and continue to achieve this?

hard

A. foreach ($n in 1..10) {
if ($n % 2 -eq 0) { break }
if ($n -gt 7) { continue }
Write-Output $n
}

B. foreach ($n in 1..10) {
if ($n % 2 -eq 0) { continue }
Write-Output $n
if ($n -gt 7) { break }
}

C. foreach ($n in 1..10) {
if ($n -gt 7) { continue }
if ($n % 2 -eq 0) { break }
Write-Output $n
}

D. foreach ($n in 1..10) {
if ($n -gt 7) { break }
if ($n % 2 -eq 0) { continue }
Write-Output $n
}

Solution

1. Step 1: Understand conditions order

   We must stop loop when number > 7, so break must check that first to stop immediately.

2. Step 2: Skip even numbers using continue

   After checking break, skip even numbers with continue to avoid output.

3. Step 3: Verify output

   Outputs odd numbers from 1 to 7 only, then stops.

4. Final Answer:

   Option D script -> Option D

5. Quick Check:

   break before continue for correct flow [OK]

Hint: Check break condition before continue to stop early [OK]

Common Mistakes:

• Placing continue before break causing wrong stop
• Using break to skip even numbers instead of continue
• Not stopping loop when number > 7