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Technical Vocabularynoun · /ˈlɔːɡɪŋ/

logging

In simple English

Logging is one of the most fundamental practices in software development. When code runs, developers add statements that write messages to a log file or output stream. These messages capture events like function calls, variable values, errors, and timestamps. This creates a detailed record of what happened in the application, which helps engineers understand flow, find bugs, and monitor production systems. In tech companies, logging is discussed constantly in standup meetings, code reviews, and incident postmortems. Teams argue about log levels (DEBUG, INFO, WARNING, ERROR), log retention policies, and whether logs contain too much or too little information. Poor logging makes debugging slow and painful; good logging saves hours of troubleshooting. Logging is also critical for production systems. When a user reports a bug or a service goes down, the first thing engineers do is check the logs. This is why experienced developers say 'log early and often' and why every backend system needs structured, searchable logging infrastructure.

Understand what logging is in programming and why developers use it to track application behavior.

At a glanceCEFR B2
Commonness5/5
Versatility5/5
FormalityCasualFormalNeutral
Spoken ↔ WrittenSpokenWrittenBoth
Directness ↔ DiplomaticDirectDiplomaticDirect
RegionUS and UK
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Say it like this

✓Check the logs to see what went wrong
✓Add more logging to that function
✓The logs show that the service crashed at midnight

Real examples

in a standup

"I added detailed logging to the payment module so we can track every transaction."

in a code review

"This code is missing logging statements. We need to log errors if the API call fails."

in a team meeting

"The customer reported an issue, but our logging level was set to ERROR only, so we missed the warning signs."

Don't say this

Handle with care. Non-technical speakers may confuse logging with recording wood. In tech, logging is about recording software events, not physical logs.

✕We need to do logging of all user actions.
✓We need to add logging for all user actions.— Use 'add logging' not 'do logging.' Adding is the standard verb in tech English.
✕The logging is very important for finding the issue.
✓Good logging is critical for finding the issue.— Experienced developers talk about 'good logging' or 'better logging,' not just 'logging is important.'
✕We logged in to the system and saw an error.
✓We checked the logs and found an error.— 'Logged in' means entering a system with credentials. 'Checked the logs' means reviewing log files.

Other forms

noun

logging

"Proper logging helps us understand system behavior."

verb

log

"We log every error to help with debugging."

noun

logs

"Check the logs if the service fails."

Often used with

add loggingThe most common phrase; means to insert logging statements into code
check the logsTo review log files to understand what happened
debug loggingExtra detailed logging used temporarily while fixing problems
log levelThe severity level of a log message (DEBUG, INFO, WARNING, ERROR, FATAL)
structured loggingLogging in a machine-readable format like JSON for easier searching
log fileThe file where log messages are written and stored

Similar words

tracingSimilar but often more detailed; shows the path code takes through a program
monitoringBroader term; includes logging but also covers metrics and alerts
recordingGeneral term; logging is a specific type of recording in software

Opposites

silencesuppressing output

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Practice

Try it

4 quick exercises

Pick the most natural phrasing

1. Your code has a bug. What do you say to your teammate?

Complete the sentence

2. When the service crashed, we checked the _______ to see what happened.

Spot the mistake

3. Which sentence uses logging incorrectly?

Rewrite naturally

4. Rewrite using logging: 'We need to write down information about what happens when the code runs so we can understand problems.'

Questions

Quick poll

Have you said "logging" in a standup this week?

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