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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
please enter only digits
Grammar usage guide and real-world examplesUSAGE SUMMARY
"please enter only digits" is correct and usable in written English.
You could use it as part of an instruction in a document such as a form, as in "Please enter your phone number. Please enter only digits, not letters or special characters."
✓ Grammatically correct
News & Media
Academia
Science
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
Please enter only once.
News & Media
Phone is required, and please enter numbers Only.
Academia
Please enter a 10-digit US mobile number.
News & Media
Note: When prompted, please enter your 8-10 digit Student ID number to receive credit for completion.
It read, as snippily as text can sound, "Please enter your 10-digit evening contact telephone number that you provided when ordering your Internet service, or your Login Code.
News & Media
Please enter the last seven digits of your NHS number into your HealthSentry device sponsored by Nivea Visage, and read out the resultant 16-letter Medicode.
News & Media
Please enter a valid age.
News & Media
Please enter your information to continue.
News & Media
Please enter a year from 1917 to 2017.
News & Media
For now, please enter your questions.
News & Media
Please enter on 79th Street and Columbus Ave.
News & Media
Expert writing Tips
Best practice
When providing this instruction, make sure the input field is clearly labeled and designed to accept only numerical input to minimize user errors.
Common error
Don't assume users know what a "digit" is. Clarify with examples if necessary, especially for non-technical audiences, such as "please enter only digits (0-9)".
Source & Trust
82%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "please enter only digits" functions primarily as an imperative instruction, directing the user to input a specific type of data. Ludwig's analysis confirms its usability in instructional contexts.
Frequent in
News & Media
33%
Academia
33%
Science
33%
Less common in
Formal & Business
0%
Wiki
0%
Encyclopedias
0%
Ludwig's WRAP-UP
The phrase "please enter only digits" serves as a direct, polite instruction for data input, commonly used in user interfaces across various digital platforms. Ludwig confirms it's grammatically sound and suitable for instructional purposes. While relatively rare, the phrase is clear and effectively restricts input to numerical characters. For alternative phrasings, consider using "enter numerical characters only" for a more formal tone. Remember to clearly label the input field to prevent user errors. It's usability and overall appropriateness for conveying a specific direction makes it a useful sentence in different contexts, as also confirmed by Ludwig.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
Enter digits only
This is a more concise version of the original phrase, omitting the "please".
Digits only, please
This alternative reorders the elements of the phrase, emphasizing the restriction to digits.
Enter numerical characters only
This alternative uses more formal language, replacing "digits" with "numerical characters".
Numerical input only
This is a shorter, more technical phrasing of the instruction.
Input digits exclusively
This alternative uses "exclusively" to emphasize that only digits are allowed.
Only digits are permitted
This version uses a more formal tone, employing "permitted" instead of "enter".
Insert numbers only
This variation uses the word "insert" instead of "enter" and focuses on numbers.
Provide only digits
This option replaces "enter" with "provide" and maintains the directness of the original phrase.
Use digits alone
This emphasizes that digits must be used without any other characters.
Numbers are the only accepted characters
This is a more verbose and formal way of conveying the same instruction.
FAQs
How can I tell someone to input only numbers?
You can instruct them to "please enter only digits", or use alternatives like "enter numerical characters only" or "numerical input only".
What is the difference between "digit" and "number"?
While often used interchangeably, "digit" refers to a single numerical symbol (0-9), whereas "number" can refer to a single digit or a combination of digits, like 25 or 100. Therefore, "please enter only digits" is more precise.
Is it better to say "enter digits only" or "only enter digits"?
Both are grammatically correct, but "please enter only digits" is clearer and more commonly used. It places the action (enter) first, followed by the restriction (only digits).
Can I use this phrase in formal writing?
While functional, "please enter only digits" is more suitable for user interfaces or instructions. For formal writing, consider "numerical input only" or "enter numerical characters only".
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Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
82%
Authority and reliability
4.5/5
Expert rating
Real-world application tested