I should only catch numbers which are fit the rules.
Rules:
it should be 16 digit
first 11 digit can be any number
after 3 digit should have all zero
last two digit can be any number.
I did this way;
([0-9]{11}[0]{3}[0-9]{2})
number example:
1234567890100012
now I want to get the number even it has got any letter beginning or ending of the string like " abc1234567890100012abc"
my output should be just number like "1234567890100012"
When I add [a-zA-Z]* it gives all string.
Also another point is if there is any number beginning or ending of the string like "999912345678901000129999". program shouldn't take this. I mean It should return none or nothing. How can I write this with regex.
You can use look around to exclude the cases where there are more digits before/after:
(?<!\d)\d{11}000\d\d(?!\d)
On regex101
You can use a capture group, and match optional chars a-zA-Z before and after the group.
To prevent a partial match, you can use word boundaries \b or if the string should match from the start and end of the line you can use anchors ^ and $
\b[a-zA-Z]*([0-9]{11}000[0-9]{2})[a-zA-Z]*\b
Regex demo
Related
I have this type of regex
\b[0-9][0-9][0-9][0-9][0-9]\b
It's not complete, this will match me many examples of 5 digit but I need just first and one match from this structure:
Reference Number WW
30966 CFUN22 098765334
30967 CFUN22 098765335
30968 CFUN22 098765336
30969 CFUN22 098765337
In this case I need just "30966" , not 30967,30968 and so on...
I tried to do
\b[0-9][0-9][0-9][0-9][0-9]\b
You can use a positive lookbehind to make sure that you're grabbing the first 5-digit number after the word "Comments":
(?<=Comments\n)\d{5}\b
https://regex101.com/r/pZLj4K/1
Try using the following regex:
^\N+\n.*?(\d{5})
It will match:
^: start of string
\N+\n: any sequence of non-newline characters, followed by newline
\n: the newline character
.*?: optional smallest sequence of characters
(\d{5}): "Group 1" - sequence of five characters
Your needed digits can be found within Group 1.
Given you're dealing with a textual table, using \N\n will allow you to skip the header from selection, while .*? will allow to match your code not necessarily at the beginning of the second line.
Check the regex demo here.
I am trying to write a regex to max a sequence of numbers that is 5 digits long or over, but I ignore any spaces, dashes, parens, or hashes when doing that analysis. Here's what I have so far.
(\d|\(|\)|\s|#|-){5,}
The problem with this is that this will match any sequence of 5 characters including those characters I want to ignore, so something like "#123 " would match. While I do want to ignore the # and space character, I still need the number itself to be 5 digits or more in order to qualify at a match.
To be clear, these would match:
1-2-3-4-5
123 45
2(134) 5
Bonus points if the matching begins and ends with a number rather than with one of those "special characters" I am excluding.
Any tips for doing this kind of matching?
If I understood requirements right you can use:
^\d(?:[()\s#-]*\d){4,}$
RegEx Demo
It always matches a digit at start. Then it is followed by 4 or more of a non-capturing group i.e. (?:[()\s#-]*\d) which means 0 or more of any listed special character followed by a digit.
So just repeat a digit, followed by any other sequence of allowed characters 5 or more times:
^(\d[()\s#-]*){5,}$
You can ensure it ends on a digit if you subtract one of the repetitions and add an explicit digit at the end:
^(\d[()\s#-]*){4,}\d$
You can suggest non-digits with \D so et would be something like:
(\d\D*){5,}
Here is a guide.
I need to find the text of all the one-digit number.
My code:
$string = 'text 4 78 text 558 my.name#gmail.com 5 text 78998 text';
$pattern = '/ [\d]{1} /';
(result: 4 and 5)
Everything works perfectly, just wanted to ask it is correct to use spaces?
Maybe there is some other way to distinguish one-digit number.
Thanks
First of all, [\d]{1} is equivalent to \d.
As for your question, it would be better to use a zero width assertion like a lookbehind/lookahead or word boundary (\b). Otherwise you will not match consecutive single digits because the leading space of the second digit will be matched as the trailing space of the first digit (and overlapping matches won't be found).
Here is how I would write this:
(?<!\S)\d(?!\S)
This means "match a digit only if there is not a non-whitespace character before it, and there is not a non-whitespace character after it".
I used the double negative like (?!\S) instead of (?=\s) so that you will also match single digits that are at the beginning or end of the string.
I prefer this over \b\d\b for your example because it looks like you really only want to match when the digit is surrounded by spaces, and \b\d\b would match the 4 and the 5 in a string like 192.168.4.5
To allow punctuation at the end, you could use the following:
(?<!\S)\d(?![^\s.,?!])
Add any additional punctuation characters that you want to allow after the digit to the character class (inside of the square brackets, but make sure it is after the ^).
Use word boundaries. Note that the range quantifier {1} (a single \d will only match one digit) and the character class [] is redundant because it only consists of one character.
\b\d\b
Search around word boundaries:
\b\d\b
As explained by the others, this will extract single digits meaning that some special characters might not be respected like "." in an ip address. To address that, see F.J and Mike Brant's answer(s).
It really depends on where the numbers can appear and whether you care if they are adjacent to other characters (like . at the end of a sentence). At the very least, I would use word boundaries so that you can get numbers at the beginning and end of the input string:
$pattern = '/\b\d\b/';
But you might consider punctuation at the end like:
$pattern = '/\b\d(\b|\.|\?|\!)/';
If one-digit numbers can be preceded or followed by characters other than digits (e.g., "a1 cat" or "Call agent 7, pronto!") use
(?<!\d)\d(?!\d)
Demo
The regular expression reads, match a digit (\d) that is neither preceded nor followed by digit, (?<!\d) being a negative lookbehind and (?!\d) being a negative lookahead.
Can I use
\d\d\d\d[^\d]
to check for four consecutive numbers?
For example,
411112 OK
455553 OK
1200003 OK
f44443 OK
g55553 OK
3333 OK
f4442 No
45553 No
f4444g4444 No
f44444444 No
If you want to find any series of 4 digits in a string /\d\d\d\d/ or /\d{4}/ will do. If you want to find a series of exactly 4 digits, use /[^\d]\d{4}[^\d]/. If the string should simply contain 4 consecutive digits use /^\d{4}$/.
Edit: I think you want to find 4 of the same digits, you need a backreference for that. /(\d)\1{3}/ is probably what you're looking for.
Edit 2: /(^|(.)(?!\2))(\d)\3{3}(?!\3)/ will only match strings with exactly 4 of the same consecutive digits.
The first group matches the start of the string or any character. Then there's a negative look-ahead that uses the first group to ensure that the following characters don't match the first character, if any. The third group matches any digit, which is then repeated 3 times with a backreference to group 3. Finally there's a look-ahead that ensures that the following character doesn't match the series of consecutive digits.
This sort of stuff is difficult to do in javascript because you don't have things like forward references and look-behind.
Should the numbers be part of a string, or do you want only the four numbers. In the later case, the regexp should be ^\d{4}$. The ^ marks the beginning of the string, $ the end. That makes sure, that only four numbers are valid, and nothing before or after that.
That should match four digits (\d\d\d\d) followed by a non digit character ([^\d]). If you just want to match any four digits, you should used \d\d\d\d or \d{4}. If you want to make sure that the string contains just four consecutive digits, use ^\d{4}$. The ^ will instruct the regex engine to start matching at the beginning of the string while the $ will instruct the regex engine to stop matching at the end of the string.
I have two regular expressions that validate the values entered.
One that allows any length of Alpha-Numeric value:
#"^\s*(?<ALPHA>[A-Z0-9]+)\s*"
And the other only allows numerical values:
#"^\s*(?<NUM>[0-9]{10})"
How can I get a numerical string of the length of 11 not to be catched by the NUM regex.
I think what you're trying to say is that you don't want to allow any more than 10 digits. So, just add a $ at the end to specify the end of the regex.
Example: #"^\s*(?[0-9]{10})$"
Here's my original answer, but I think I read you too exact.
string myRegexString = `#"(?!(^\d{11}$)` ... your regex here ... )";
That reads "while ahead is not, start, 11 digits, end"
If it's single line, you could specify that your match must happen at the end of the line, like this in .net ...
^\s*([0-9]{10})\z
That will accept 1234567890 but reject 12345678901.
Do you mean you want to match up to 10 digits? Try this:
#"^\s*[0-9]{1,10}\s*$"
If you are trying to match only numbers that are 10 digits long, just add a trailing anchor using $, like this:
^\s*(?:[0-9]{10})\s*$
That will match any number that is exactly 10 digits long (with optional space on either side).
var pattern =/\b[0-9]{10}$\b/;
// the b modifier is used for boundary and $ is used for exact length
Match something non-numeric after the length 10 string. My regex-foo isn't that good, but I think you've got it setup there to catch a numeric string of exactly length 10, but since you don't match anything after that, a length 11 string would also match. Try matching beyond the end of the number and you'll be good.
This should match only 10 digits and allow arbitrary numbers of whitespaces before and after the digits.
Non-capturing version: (only matches, the matched digits are not stored)
^\s*(?:\d{10})\s*$
Capturing version: (the matched digits are available in subgroup 1, as $1 or \1)
^\s*(\d{10})\s*$
You could try alternation?
^\s*(?\d{1,10}|\d{12,})