Used and loved by millions
Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com
input a topic
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "input a topic" is correct and usable in written English.
It can be used when asking someone to enter or provide a specific subject or theme, often in the context of a form or digital interface. Example: "Please input a topic for your research paper in the designated field."
✓ Grammatically correct
Wiki
Science
News & Media
Alternative expressions(3)
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified similar examples from authoritative sources
Similar Expressions
60 human-written examples
An ad unit called the 'Community Poll' asks users for input on a topic, and then presents the current results to other visitors.
News & Media
We communicate with the engine using the Pub/Sub messaging service.9 Specifically, we deploy a topology composed of four operators: (1) a Pub/Sub subscriber that reads elements from an input topic; (2) a window operator; (3) a reducer that concatenates the content of each window into an output string; (4) the Pub/Sub publisher that writes the results of the reducer on an output topic.
Science
Post your own thoughts, comment on other people's, or invite input from others by opening a topic of your own".
News & Media
Even without instructor input, student performance improves when students individually answer similar but new questions on a topic.
Science
Input: Crawling Topic Tags, Crawling URLs.
Suggest a topic.
Wiki
Write a topic sentence.
Wiki
Pick a topic area.
Wiki
Have a topic.
Wiki
Explain a topic?
Wiki
Choose a topic.
Wiki
Expert writing Tips
Best practice
When using "input a topic" in user interfaces, ensure the input field is clearly labeled and provides helpful examples or suggestions.
Common error
Avoid using "input a topic" when you mean to conduct in-depth research on a subject; instead, use it when specifically prompting for a topic to be entered.
Source & Trust
74%
Authority and reliability
4.1/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "input a topic" functions as an imperative, directly instructing someone to enter or provide a specific subject or theme. This usage aligns with Ludwig AI's assessment of its correctness and usability.
Frequent in
Wiki
33%
Science
33%
News & Media
33%
Less common in
Formal & Business
0%
Encyclopedias
0%
Reference
0%
Ludwig's WRAP-UP
In summary, "input a topic" is a correct and usable imperative phrase used to request someone to enter a specific subject or theme, often in a digital interface. Ludwig AI confirms its appropriateness in various contexts. While not highly frequent, its usage spans across wiki, science, and news & media domains. For more formal settings, alternatives such as "specify a topic" may be more suitable. Remember to use it when specifically asking for a topic to be entered, rather than in broader research contexts. Provide clear labeling for input fields when using the phrase in user interfaces.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
Specify a topic
Replaces "input" with the more formal verb "specify".
Enter a subject
Substitutes "topic" with the synonym "subject".
Provide a theme
Uses "theme" instead of "topic" and "provide" instead of "input".
Suggest a subject
Emphasizes offering a topic for consideration.
Designate a topic
Implies a more formal selection or assignment of the topic.
Nominate a topic
Suggests offering a topic for voting or selection.
Choose a theme
Focuses on the selection of a central theme.
Indicate a subject
Highlights the act of pointing out or specifying a subject.
State a topic
Emphasizes the act of clearly declaring a topic.
Propose a theme
Suggests putting forward a theme for discussion or consideration.
FAQs
What does "input a topic" mean?
It means to enter or provide a subject or theme, typically in a form or digital interface.
What can I say instead of "input a topic"?
You can use alternatives like "specify a topic", "enter a subject", or "suggest a subject" depending on the context.
How do I use "input a topic" in a sentence?
Use it as an imperative phrase, such as: "Please input a topic for your presentation."
Is "input a topic" formal or informal?
It tends to be neutral, suitable for both formal and informal contexts depending on the situation. However, options like "specify a topic" might be more appropriate for very formal settings.
Editing plus AI, all in one place.
Stop switching between tools. Your AI writing partner for everything—polishing proposals, crafting emails, finding the right tone.
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
74%
Authority and reliability
4.1/5
Expert rating
Real-world application tested