Regex for 16 digit number. 123 Only 1 and 3 are matched by the regex \d; 2 is not.

Regex for 16 digit number So in using the regex as shown below you can have 9 minimum (3+3+3) and 10 maximum (3+3+4). Generally for a sequence of digit numbers without other characters in between, only the odd order digits are matches, and the even order digits are not. To match all characters from 0 to 255, we’ll need a regex that matches between one and three characters. Any suggestions on how to get this to work to only match strings with SW and 4 digits? Regex Range A utility that can generate a regex code to match any range of numbers. 34 or -0. Regular expression tester with syntax highlighting, explanation, cheat sheet for PHP/PCRE, Python, GO, JavaScript, Java, C#/. Jul 23, 2025 · Explanation: [^0-9]: Matches any character that is not a digit (0–9). Basically, your equation will look like a regular addition problem that adds every single digit. Below are steps that can be taken for the problem: Accept the string Create a regex pattern to validate the BANK ACCOUNT NUMBER: Feb 20, 2017 · Can you help me to find out how I can build some regular expression to detect a valid sequence of numbers of 13 digits first case: Feb 3, 2011 · Plus I decided this was an opportunity to whittle away at my regular expression deficiencies. Oct 14, 2019 · \d{16} will match any 16 consecutive digits, including 16 digits within a longer string of digits ^\d{16}$ will match a line that is exactly 16 consecutive digits, but if there is anything else in the string, the match will fail \D\d{16}\D will match a string of 16 consecutive digits, but only if it is surrounded by non-digit characters. The valid Visa Card number must satisfy the following conditions: It should be 13 or 16 digits long, new cards have 16 digits and old cards have 13 digits. Sep 19, 2024 · (Please note, the 4 highlighted in bold in the ending brackets it the number used to determine the minimum and maximum number. If the digit string is optional and this is part of a larger regex, it would be what you want. Feb 10, 2012 · How do I create a regular expression that detects hexadecimal numbers in a text? For example, ‘0x0f4’, ‘0acdadecf822eeff32aca5830e438cb54aa722e3’, and 52 I am looking to match a 15 digit number (as part of a larger regex string). «{3}» Or, if you don’t want to capture anything, replace Apr 12, 2024 · Example : The Regular expression . *(?:\D|^)(\d+) to get the last number; this is because the matcher will gobble up all the characters with . I want to match a number between 2-16, spanning 1 digit to 2 digits. It may contain white spaces or a hyphen ( - ). org Regular expression tester with syntax highlighting, explanation, cheat sheet for PHP/PCRE, Python, GO, JavaScript, Java, C#/. Oct 21, 2023 · Learn how to validate and accept only numbers from 0 to 9 using a regex pattern. Before performing the check for a valid number, perform a search-and-replace to strip out spaces and hyphens. And another one that specifies what range of digits is allowed for each digit in a three-digit Mar 10, 2025 · Regex: ^3[0-9]{12,18}$ Here: {12,18}: This quantifier matches between 12 and 18 digits. From reading around, I'm sure my current implementation can be simplified a lot. Retrieve the credit card number entered by the customer and store it into a variable. Nov 23, 2012 · I need to check by Regex expression if 9 or 14 digits are typed. I have created a procedure which filters out these false positives, but I thought it was worth seeing if someone can improve the above, so others can use the regex function. Matching multiple digits \d\d will match 2 consecutive digits \d+ will match 1 or more consecutive digits \d* will match 0 or more consecutive digits \d{3} will match 3 consecutive digits \d{3,6} will match 3 to 6 consecutive digits \d{3 Lesson 3: Matching Digits in Regular Expressions The \d metacharacter is a cornerstone in regex to identify digits in a string. Is it possible to write a regular expression that matches all strings that does not only contain numbers? If we have these strings: abc a4c 4bc ab4 123 It should match the four first, but not the l A collection of useful Regular Expressions to parse and validate Credit Card Numbers like Visa, MasterCard, American Express, Discover, etc. This regex will match a 16-digit number. I don't want to match a number in the middle of a string, and I don't want to match a number between multiple lines. Right now, I have Aug 3, 2014 · Off the top of my head, these look like regular expressions to match US phone numbers. In this case, I have an R vector of strings with baseball data in this format: hit_v May 14, 2013 · 0 It sounds like you're trying to do a find / replace in Visual Studio of a 3 digit number (references to Express and Find/Replace tool). * will tell the computer that any character can be used any number of times. Jun 30, 2010 · I'm trying to use the range pattern [01-12] in regex to match two digit mm, but this doesn't work as expected. Now I know how to tell using regular expressions if a string contains a number between say 1 and 10. RegExPlus has built-in support for matching numeric ranges, since the need to match a numeric range is sometimes necessary. For example, \d will match any single digit in a string such as the '3' in abc3def . The valid Master Card number must satisfy the following conditions. Works for both positive and negative numbers. REGEXP_SUBSTR The REGEXP_SUBSTR function in SQL is used to extract a substring from a string that matches a specified regular expression pattern. info has examples for 1 or 2 digit ranges, but not something that spans both: The regex [0-9] matches single- Nov 1, 2012 · The following regex will match the range 9-11 digits: /\d{9,11}/ What is the best way to write a regex matching exactly 9 or 11 digits (excluding 10)? Using the pattern attribute of an input element, thus the regex should match the entire value of the input field. For example in 12345, the matches are 1, 3 and 5. C# Example Here's how you can use this regex pattern in a C# application to find and validate 16-digit numbers: Nov 6, 2012 · I was searching for regular expression for just 7 digits and another for just 9 digits, all I found was for [0-7] and [0-9], not exact 7 and 9 digits - no shorter no longer- How can I find those ? You can use . This would be strictly ascending/ Jul 10, 2012 · Note that that will also match the empty string, unlike \d {0,10}. Dec 12, 2018 · I want to match a number which is less than or equal to 100, it can be anything within 0-100, but the regex should not match for a number which is greater than 100 like 120, 130, 150, 999, etc. Complex Regex puzzle in C# Jul 2, 2024 · In the example above, the pattern \d matches the digit “3” in the text “I have 3 apples. Regular expressions are mainly used for searching, validating, and transforming texts or strings. Put a capturing group around the repeated group to capture all iterations. With "^[1-9][0-9]{14}" you are matching 15 digit number, and not 10-15 digits. I encourage you to print the tables so you have a cheat sheet on your desk for quick reference. It can also accept a single zero. Enable less experienced developers to create regex smoothly. What is a regex for a decimal number? To match a number with a decimal point, like 12. Learn how to match numbers using regex with step-by-step examples in JavaScript, Python, Java, and PHP. Jul 23, 2025 · Given some Phone Numbers, the task is to check if they are valid or not using regular expressions. *, then backtrack to the first non-digit character or the start of the string, then match the final group of digits. It is the opposite of \d In Java for String class there is a method called matches. When it comes to validating whether a number lies within a certain range (for instance, between 1 and 15), regex can provide a concise solution. Nov 11, 2014 · I used a variation of this \d {7,7} with Notepad++'s TextFX Find/Replace feature to get all 7 digit numbers in a file. The ^ inside square brackets negates the range. Regex for digits: use our regex tool for matching any digit, this regex uses the most common number formats. If you are dealing with plain numbers 'intgers' from 0 to 12, representing say a 12-hour clock, you can use the following expression: <p>You can match numbers in the given string using either of the following regular expressions −</p><pre class="result notranslate">“\\d+” Or, " ( [0-9]+)"</pre How to validate phone numbers using regex? Validating phone numbers with a regular expression can vary widely depending on the country, format, and specific rules (e. ). Regular expressions (regex) are powerful tools for matching and manipulating strings based on specific patterns. Apr 19, 2012 · Finds numbers composed only of two or more decimals of any script in descending order, like 987 or 54321. The first one matches a number comprised of either 10 digits, or 11 digits if the first number is 1. For example, to RegExr is an online tool to learn, build, & test Regular Expressions (RegEx / RegExp). Your negative lookahead isn't working because on the string "1 3", for example, the 1 is matched by the \d+, then the space matches the negative lookahead May 8, 2013 · I want to write a regular expression in C# that inputs only a specific number of only numbers. 6. Optional character ( ? ) This symbol tells the computer that the preceding character may or may not be present in the string to be matched. The second scrubbing regex contains fewer exceptions, matching potentially more false data at the expense of Dec 7, 2012 · The Perfect Credit Card Number RegEx Posted by Richard on December 7, 2012 I’d love to give you a single credit-card-number-matching regular expression and tell you that my über-cool rule is The One Rule to match them all. Dec 9, 2013 · If the results from any of the numbers from step 1 are double digits, make sure to add the two numbers first (i. Generic credit card number: A generic regex to match credit card numbers between 13 to 19 digits without checking for specific starting digits could be: Regex: ^[0-9]{13,19}$ Nov 14, 2008 · I need a regular expression pattern to only accept positive whole numbers. 1? — optionally match a 1 \d — match a digit between 0 and 9 (escaped as \\d in Java) {10} — match the preceding character 10 times (in this case, a digit) The second one matches the same pattern, with Oct 29, 2025 · Unless your company uses 16-digit numbers for other purposes, you’ll have few false positives. Nov 18, 2024 · AI-native platform for on-call and incident response with effortless monitoring, status pages, tracing, infrastructure monitoring and log management. Once found I want to replace it with a blank space. Feb 12, 2017 · It's a simple question about regular expressions, but I'm not finding the answer. I want to determine whether a number appears in sequence exactly two or four times. Standing for "digit", it matches any single numeral from 0 to 9, providing a clean and straightforward way to locate numerical data. Feb 26, 2016 · You mentioned that you want the regex to match each of those strings, yet you previously mention that the is 1-2 digits before the decimal? This will match 1-2 digits followed by a possible decimal, followed by another 1-2 digits but FAIL on your example of . The regex \b\d{13,16}\b will find any sequence of 13 to 16 digits. When to Use RegEx to Validate a Credit Card Number? The third-party services charge for each Regular expression tester with syntax highlighting, explanation, cheat sheet for PHP/PCRE, Python, GO, JavaScript, Java, C#/. Master regex patterns with examples! Nov 15, 2019 · I need to extract a number from a string with several conditions. The tables below are a reference to basic regex. See full list on regextutorial. Jul 15, 2025 · Given string str, the task is to check whether the given string is a valid Master Card number or not by using Regular Expression. Certain repetitive and sequential groups common to many false CCN s are ignored, impacting approximately 0. [0-9] matches a single digit, while [0-9]+ matches one or more consecutive digits. 123 Only 1 and 3 are matched by the regex \d; 2 is not. What syntax can I use? \\d{wha Oct 9, 2022 · A regular expression is a sequence of characters that forms a search pattern. It should start with either two digits numbers may range from 51 to 55 or four digits numbers may range from 2221 to 2720. Just enter start and end of the range and get a valid regex. If the cards have 13 digits the next twelve digits should be any number between 0-9 Jul 15, 2025 · Given a string str, the task is to check whether the given string is a valid Visa Card number or not by using Regular Expression. It is particularly useful for Nov 20, 2012 · I would like to test a number between 1 and 100 Regex = ^[1-9]?[0-9]{1}$|^100$ Jul 15, 2025 · Given string str, the task is to check whether the given string is a valid Master Card number or not by using Regular Expression. Learn how to validate credit card numbers like Mastercard, Visa Card, and American Express with regular expressions. Perfect for developers seeking precise number validation techniques. By applying a filter function, you can extract numbers of the specified length. String number = scanner. Combining \d with Quantifiers To extend its Regular expression tester with syntax highlighting, explanation, cheat sheet for PHP/PCRE, Python, GO, JavaScript, Java, C#/. I came up with ^ ( [0-9] { That matches either the single digit 0 or a three-digit number. Give a range there using {m,n} quantifier: <p>You can match numbers in the given string using either of the following regular expressions −</p><pre class="result notranslate">“\\d+” Or, " ( [0-9]+)"</pre A tool to generate simple regular expressions from sample text. This regular expression will match a 13-16 digit number consisting of 4 digits followed by 3 digits. The regex [0-9] matches single-digit numbers 0 to 9. If you need more information on a specific topic, please follow the link on the corresponding heading to access the full article or head to the guide. You can use it to match a digit or a set of digits such as phone numbers, number ids, and more. In the case of 51 to 55, the next fourteen Because regex doesn't recognize numbers, it recognizes digits and characters. Assert position at the beginning of the string «^» Match the regex below and capture its match into backreference number 1 «([0-9]{2}:?){3}» Exactly 3 times «{3}» You repeated the capturing group itself. It should start with 4. ” The re. So even though we as humans recognize that 10 is the number after 9, regex has no concept of that; all it know about are the digits from 0-9. Regular-Expressions. Dec 12, 2023 · Dec 12, 2023 Garre_Akhil Validating credit card numbers with various formats can be achieved using a regular expression. Credit card numbers typically consist of a sequence of 13 to 16 digits, with optional spaces or dashes in between. Below are steps that can be taken for the problem: Accept the string Create a regex pattern to validate the BANK ACCOUNT NUMBER: Feb 20, 2017 · Can you help me to find out how I can build some regular expression to detect a valid sequence of numbers of 13 digits first case: Learn how to use regex to accurately match 10 to 15 digit numbers in strings. 34% of potentially valid numbers. I’d be lying. By itself, this regex may have issues (since the empty string is located everywhere within a string). As it detects the first 16 digits in the string the regex returns the value. Jul 23, 2025 · Approach to Validate Account Number Using Regular Expressions The idea is to use Regular Expression to solve this problem. Generate regular expressions for numeric ranges. Sep 4, 2009 · To do this with pure regex you need to identify the pattern and write it out: ^(0?[0-9]{1,2}|1[0-7][0-9]|180)$ This has three alternatives: one for single- and two-digit numbers (allowing leading zeroes), where each digit can be anything from 0 to 9. Learn how to validate a 16-digit number using regular expressions. Aug 24, 2016 · I've been trying to create a regex query to match numbers What I'm trying to match is a 15 or 16 digit number, between each number there can be 0 or more spaces, or - 's. In this guide, we will walk through constructing a regex pattern to accomplish this task, complete with examples and troubleshooting tips. findall () function returns a list of all matches found in the text. findInLine("\\d{8}"); But it turns out, it also matches 9 and more digits number. Apr 22, 2021 · 1234567890 - 10 digits 233445678912 - 12 digits 2334456789122222 - 16 digits My chat application works for first 3 numbers but doesn't work for 16 digit phone number. Regex will validate the entered data and will provide the exact format. [1-9][0-9] matches double-digit numbers 10 to 99. Apart from \d, there are other metacharacters such as: \w which matches all word characters (a-z, A-Z, 0-9, and _) \D which matches all non-digit characters. A 16-digit credit card number, with the first digit being a 5 and the second digit being a 1, 2, 3, 4, or 5 (the rest of the digits I am trying to use a regular expression validation to check for only decimal values or numeric values. Many developers have difficulty defining regular expressions; even more unknowingly fail to understand the appropriate usage of regexes and how and when Regular expression tester with syntax highlighting, explanation, cheat sheet for PHP/PCRE, Python, GO, JavaScript, Java, C#/. ?\d{1,2} This will match 0-2 digits followed by a possible deciaml, followed by another 1-2 digits and match on your example Apr 19, 2024 · The final non-capturing group supports both 13 and 16 digit card numbers. This handles negative numbers and also correctly matches a single zero. This pattern requires at least one digit after the decimal point. Example : We may write the format for document file as – “docx?” The ‘?’ tells the computer that x may or may not be present in the Apr 6, 2018 · In this tutorial we look at how to write regex to find numbers using T-SQL. Unlock the power of regular expressions and simplify your coding tasks today! Regex for digits: use our regex tool for matching any digit, this regex uses the most common number formats. The last 3 digits are optional, allowing for a total of 13, 14, 15, or 16 digits. Learn how to create and use regex patterns effectively to filter numeric values in your data. Whether you’re parsing text, validating input, or extracting numeric data, this pattern is essential. \d+$. Apr 20, 2012 · I currently have a regex that pulls up a 16 digit number from a file e. Rules for the valid phone numbers are: The numbers should start with a plus sign ( + ) It should be followed by Country code and National number. One of the fastest and easiest ways to create a regular expression to match any digit. It should be 16 digits long. The question asked for 0 to 99. Matching Digits of Specific Length To match digits of a specific length, you can use the curly braces { } in your regex pattern. If that's the case the regex to find a 3 digit number in Visual Studio is the following <:d:d:d> Breakdown The < and > establish a word boundary to make sure we don't match a number subset. The expression \\d{9}|\\d{14} seems to be not working properly, what's wrong ? Does anyone know of a regular expression for matching on a sequence of four digits? I need a match on ascending (1234), descending (4321), or the same (1111). Implementing this pattern in your code will ensure that no characters are accepted, providing a reliable method for data validation. Most important things to know about Numbers only (digits only) regex and examples of validation and extraction of Numbers only (digits only) from a given string in JavaScript programming language. Jun 13, 2021 · I need a regular expression that validate for a number with length 4, 5, 6 I used ^[0-9]{4} to validate for a number of 4, but I do not know how to include validation for 5 and 6. 3. Jun 5, 2018 · I am stuck on this regex problem. Mar 10, 2025 · Regex: ^3[0-9]{12,18}$ Here: {12,18}: This quantifier matches between 12 and 18 digits. {14} quantifier would match exactly 14 repetition of previous pattern. : Regex: Regex. g. Is it possible to write a regular expression that matches all strings that does not only contain numbers? If we have these strings: abc a4c 4bc ab4 123 It should match the four first, but not the l Mar 2, 2023 · So, \d is a metacharacter that matches any digit from 0 to 9. If the cards have 13 digits the next twelve digits should be any number between 0-9 Dec 17, 2024 · The regex pattern \d+ is a fundamental expression used for identifying and working with digits in a string. I thougth [0-9]{4} would do the job, but it also matches strings with 5 digits and so on. Dec 20, 2012 · I want that the text field only accept numeric values and spaces. The group will capture only the last iteration. Learn Regular Expressions - Matching various numbers[a-b] where a and b are digits in the range 0 to 9 [3-7] will match a single digit in the range 3 to 7. many thanks for leading me to the solution I needed. It requires at least 13 digits and accepts up to 16 Mar 8, 2017 · Ok, i have a regex pattern like this /^([SW])\w+([0-9]{4})$/ This pattern should match a string like SW0001 with SW -Prefix and 4 digits. 33 \d{1,2}\. ' ': The replacement string is an empty string, effectively removing all non-numeric characters. I am not a huge fan of regex and have limited understanding of it hence I want to to know if my regex has any fault? And if yes then how can I fix it? Jun 18, 2023 · (Credit card # validation regular expression) The regex \b(?:\d[ -]*?){13,16}\b is a powerful tool used for validating credit card numbers. This recursive regex includes a callout to Perl code that checks whether the look ahead digit has a code point value that is the successor of the current digit; that is, its ordinal value is one greater. But user enters numeric value, it don't be first digit "0" How do I do that? Dec 14, 2012 · A data-mask regex for scrubbing 16-digit VISA card numbers with optional spaces or dashes as matching delimiters between the number groups. Jun 8, 2022 · Open regex in editor Description Finds a number that is 13-16 digits long. Give a range there using {m,n} quantifier: A tool to generate simple regular expressions from sample text. Like writing a regular expression to validate 5 digits number like so "12345" Apr 19, 2024 · The final non-capturing group supports both 13 and 16 digit card numbers. Match(l, @"\d{16}") This would work well for a number as follows: 1234567891234567 Although how could I also include numbers in the regex such as: 1234 5678 9123 4567 and 1234-5678-9123-4567 Regular expression tester with syntax highlighting, explanation, cheat sheet for PHP/PCRE, Python, GO, JavaScript, Java, C#/. , whether you allow country codes, extensions, etc. How can I find a UUID or GUID in text? You want to match an integer number within a certain range of numbers. e. Mar 27, 2018 · So regular expressions are something that I've always struggled a bit with / never spent the due time learning. It has to start with 1-9, not with 0, and it will have 8 digits. It uses \b to match word boundaries at the start and end of the number, and \d {16} to match exactly 16 digits. 3) The total from step 2 must end in zero for the credit-card number to be valid. Can have spaces or hyphens in between the numbers and will still be found. Feb 7, 2023 · Mask any 15-digit or 16-digit credit card number in a string by replacing with X's except for the last 4 digits. As such, '10' isn't a number in regex, it's a digit sequence comprising of two digits 1 and 0. Submitted by Spencer Curtis - 3 years ago (Last modified 3 years ago) Learn how to create a regular expression for only numbers to efficiently validate numeric input. 18 would yield 1+8). Here's a regex pattern that should work for the formats you've provided: " ^ (?:\d [ -]*?) {13,16}$ ". There is no one-size-fits-all regex for every phone number in the world. Learn how to use regular expressions (regex) in C# to validate and extract numbers, including patterns for integers, decimals, and numeric-only strings. You want the regular expression to specify the range accurately, rather than just limiting the number of digits. Jan 23, 2022 · I need a regular expression that will match any character that is not a letter or a number. Discover simple and effective regex patterns that match digits exclusively. 5, you can use ^-?\d*\. Follow these steps to use the regex pattern and improve the integrity of your numerical inputs. Uncover the secrets of using regex to validate and extract credit card numbers with our Ultimate Guide. Note Use the [^0-9] expression to find any character that is NOT a digit. (It you want a bookmark, here's a direct link to the regex reference tables). This regex ensures that the input consists of exactly 16 digits. How to use this method to check if my string has only digits using regular expression? I tried with below examples, but both of them retur Regular expression tester with syntax highlighting, PHP / PCRE & JS Support, contextual help, cheat sheet, reference, and searchable community patterns. How to fix this RegEx to match exactly 8 digits? For example: 12345678 should be matched, while 1234567, and 123456789 should not. This regular expression applies the Luhn algorithm to ensure the validity of credit card numbers by checking for the correct number of digits Jul 15, 2025 · Given a string str, the task is to check whether the given string is a valid Visa Card number or not by using Regular Expression. What is regular expression for this? I was trying with \\d+$ Thanks Hello, I am trying to build regex to allow only the following type of string: 9 digits followed by 2 letters followed by 4digits. Dec 16, 2019 · I want the regex to match only when the contained string is all numbers; but with the two examples below it is matching a string that contains all numbers plus an equals sign like "1234=4321". Like 23242526 or 65478932 There will be either an empty space or a Jun 13, 2021 · I need a regular expression that validate for a number with length 4, 5, 6 I used ^[0-9]{4} to validate for a number of 4, but I do not know how to include validation for 5 and 6. Any Jul 8, 2025 · Regular expression syntax cheat sheet This page provides an overall cheat sheet of all the capabilities of RegExp syntax by aggregating the content of the articles in the RegExp guide. I do not want to accept decimals, negative numbers, or numbers with leading zeros. May 21, 2023 · Using Regular Expressions to Check for Valid Hex Values Regular Expressions, often referred to as regex or regexp, are a specified set of characters that are used to identify a desired string. The above solution, [0-9]{2}, matches when you always have two digits, even when representing a single-digit number, such as 01 for 1. Includes an interactive regex tester. Mar 2, 2023 · So, \d is a metacharacter that matches any digit from 0 to 9. Generic credit card number: A generic regex to match credit card numbers between 13 to 19 digits without checking for specific starting digits could be: Regex: ^[0-9]{13,19}$ Discover the perfect regular expression for matching only numbers with our comprehensive guide. NET, Rust. Replace this regular expression globally with blank replacement text: [ -] May 31, 2023 · Hi Team, I have input 16digit number (1234567891011121) i want to validate only first 6 digit and last 4 digit from input number to output number output number is 123456******7891 If match first 6 digit and last 4 digit true else false Regards, Raja G Python Regex - Find Numbers of Specific Length in String To find numbers of a specific length N in a string, use the regular expression [0-9]+ to extract all digit sequences, then filter the results to match the desired length. The curly braces specify the exact number of occurrences you want to match. I want to accept any number containing 9 or 11 digits. Oct 29, 2025 · Since regular expressions work with text, a regular expression engine treats 0 as a single character, and 255 as three characters. Jan 15, 2011 · In most languages i am aware of, the actual regex for validating should be ^[0-9]{1,10}$; otherwise the matcher will also return positive matches if the to be validated number is part of a longer string. This pattern allows for digits, spaces, and dashes between the digits. While reading the rest of the site, when in doubt, you can always come back and look here. Nov 23, 2018 · I am trying to write a regular expresion that checks if a string starts with a number of digits (at least one), and then immediately ends with a single letter or a digit. (?:0[0-5]|[68][0-9]) groups the validation patthern for Diner's Club cards that begin with '30' and are followed by a number from 0 to 5 or begin with '36' or '38' followed by any number. . gjibv yfqerhut wwdwx wdtyr kfyk qvtvm zbotwa mra pzm drie lbnn pyhkp neje ssjxel cgjcy