What does 'comment out' mean in programming?

Comment out means to disable code by adding comment syntax (like // or /* */). The code stays in the file but the computer ignores it when running the program.

Why would you comment out code instead of deleting it?

Developers comment out code when they might need it later, when debugging to isolate a problem, or when testing different approaches. It's easier to restore commented code than to rewrite deleted code.

What's the difference between 'comment out' and 'uncomment'?

Comment out means adding comment syntax to disable code. Uncomment means removing the comment syntax to enable the code again. They are opposite actions.

Is it bad practice to leave commented-out code in a project?

Many teams consider leftover commented-out code to be technical debt. It can confuse other developers. Best practice is to remove it once you're sure you don't need it, since version control keeps the history.

How do you use 'comment out' with pronouns like 'it'?

When using a pronoun, put it between the verb and 'out': 'comment it out' (correct), not 'comment out it' (incorrect). With a noun, both work: 'comment out the code' or 'comment the code out'.

Can I say 'comment out' in a code review or standup?

Yes, 'comment out' is very common in code reviews, pair programming, standups, and Slack messages. It's standard developer vocabulary used daily in tech teams.

How to Say "comment out" at Work

Commonness	4/5
Versatility	3/5
Formality	CasualFormalCasual
Spoken ↔ Written	SpokenWrittenBoth
Directness ↔ Diplomatic	DirectDiplomaticNeutral
Region	US and UK

Say it like this

✓Can you comment out that function for now?

✓I commented out the old logic until we're sure the new version works.

✓Just comment it out — don't delete it yet.

✓Let's comment out this section and see if the bug goes away.

✓I'd recommend commenting out that code instead of removing it.

Real examples

Standup

"I commented out the failing tests so we could deploy yesterday, but I'll fix them today."

Slack message

"Hey, can you comment out that console.log before merging?"

GitHub PR

"I've commented out the old API call for now — we can remove it completely once the new endpoint is stable."

Jira ticket

"As a temporary fix, comment out the validation check until the backend team updates the schema."

Retrospective

"We had to comment out half the feature because we ran out of time in the sprint."

Sprint planning

"If we can't finish the caching logic, we'll comment it out and ship without it."

Pair programming

"Try commenting out that line and see if the error disappears."

Don't say this

✕I commented the code.

✓I commented out the code.— You need 'out' to mean 'disable'. Without 'out', it sounds like you wrote a comment about the code.

✕I commented out it.

✓I commented it out.— When using a pronoun (it, them), the pronoun goes between the verb and 'out'.

✕I will comment out the code out.

✓I will comment out the code.— Don't repeat 'out'. Use it only once.

Other forms

base form

comment out

"Let's comment out this function."

past tense

commented out

"I commented out the broken code."

present participle

commenting out

"I'm commenting out the old logic now."

past participle

commented out

"The validation has been commented out."

Often used with

comment out a lineDisable one line of code

comment out a sectionDisable a block of multiple lines

comment out for nowTemporarily disable with intent to revisit

comment out the old codeKeep previous version inactive but available

comment out and testDisable to see if it fixes a problem

Similar words

disableMore general; can mean turning off features too, not just code

deactivateMore formal; used for features or settings more than code

turn offCasual; usually for features, not specific lines of code

excludeUsed in build configs; means 'don't include' rather than 'add comment syntax'

Opposites

uncommentenableactivaterestore

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Practice

Try it

4 quick exercises

Choose the most natural phrasing

1. What should you say when you want a teammate to disable some code temporarily?

Can you comment the code?Can you comment out the code?Can you comment out the code out?

Find the error

2. I commented out it before pushing to main.

commented out itbefore pushingto main

Complete the sentence

3. I _______ the failing tests so we could deploy on time.

Rewrite more naturally

4. I made the code into a comment so it doesn't run.

Questions

Quick poll

Have you said "comment out" in a standup this week?

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