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Get number from string c#

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By using our site, you acknowledge that you have read and understand our Cookie Policy , Privacy Policy , and our Terms of Service. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. Split can extract numbers from strings. You get all the numbers that are found in a string.

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Split can extract numbers from strings. You get all the numbers that are found in a string. For those who want decimal number from a string with Regex in TWO line:. The question doesn't explicitly state that you just want the characters 0 to 9 but it wouldn't be a stretch to believe that is true from your example set and comments. So here is the code that does that. Why you don't want to use Char. IsDigit - Numbers include characters such as fractions, subscripts, superscripts, Roman numerals, currency numerators, encircled numbers, and script-specific digits.

If you want negative numbers as well simply modify this code to handle the minus sign -. Did the reverse of one of the answers to this question: How to remove numbers from string using Regex. An interesting approach is provided here by Ahmad Mageed, uses Regex and stringbuilder to extract the integers in the order in which they appear in the string.

Using tim-pietzcker answer from above , the following will work for PowerShell. Learn more. Find and extract a number from a string Ask Question. Asked 9 years, 4 months ago. Active 4 months ago. Viewed k times. I have a requirement to find and extract a number contained within a string.

David Sopko 3, 1 1 gold badge 28 28 silver badges 31 31 bronze badges. Might the number be negative? If so, how would "Hello - how are you? Decimal numbers like 1. Exponential notation like 1.

Similar but not identical : stackoverflow. Why is no answer accepted here? Active Oldest Votes. Parse b ;. Danny Beckett Sasha Reminnyi Sasha Reminnyi 2, 19 19 silver badges 26 26 bronze badges. Join "", a. Where char. Good point, that'll teach me not to test the code I write in comment! You can also make a string from a char array using the new string char[] constructor. Regex does a much better job.

NOTE: If the string contains multiple numbers, this answer will run them all together into a single number. Which may be desirable or not, depending on the goal. This is different than the top-voted Regex solution, which would return "12" for the case above. This matters for cases like phone numbers "".

Value; returns a string containing the first occurrence of a number in subjectString. Parse resultString will then give you the number. Tim Pietzcker Tim Pietzcker k 53 53 gold badges silver badges bronze badges. Match subjectString, "-? This answer ist not complete in C. It is only getting the first number in the string. Join string. Empty, Regex. Markus: The question states "I need to extract a number contained within a string", and all the examples show a single number being present in the string.

Iterating over a single item is not useful. That will require a much more complex regex - which should be dealt with in a separate question. An excellent starting point is Regular-Expressions.

NET's regex engine. DavidSopko: What are you talking about? The original question asked for a way to extract a single number from a string, both in the title and in the question body. Subsequent edits to the question a year after my answer and later by people other than the original author changed the title to "numbers". If anything, that faulty edit should be rolled back.

Where Char. ToArray ;. Dave Dave 2, 1 1 gold badge 12 12 silver badges 14 14 bronze badges. Nice solution for integers! Be aware that this won't work if you're trying to parse a decimal number because the decimal point is not a digit. Match "test 66" ; if m. WriteLine string. WriteLine "You didn't enter a string containing a number!

Pranay Rana Pranay Rana k 33 33 gold badges silver badges bronze badges. What I use to get Phone Numbers without any punctuation Join "", phone. Parse value ; Console. Tabares Tabares 2, 3 3 gold badges 29 29 silver badges 37 37 bronze badges.

IsDigit t select t. ToArray ; Console. WriteLine new string getNumbers ;. I just don't like from t.. Another simple solution using Regex You should need to use this using System. WriteLine mystr ; Console. WriteLine mynumber ;. You can also try this string. Join null,System. BvdVen BvdVen 2, 17 17 silver badges 29 29 bronze badges. Parse match. Daniel Gehriger Daniel Gehriger 6, 2 2 gold badges 28 28 silver badges 54 54 bronze badges.

TryParse Regex. Value, out result ; Same thing applys to float , long , etc Richard Fu Richard Fu 6 6 silver badges 21 21 bronze badges. Parse m. Ramireddy Ambati Ramireddy Ambati 1 1 silver badge 5 5 bronze badges. This is the best answer which gave me what I wanted, which is array of multiple numbers within string.

If only it could ignore commas in numbers thousand separator then that would be perfect! You can do this using String property like below: return new String input. ToArray ; which gives only number from string. Rahul Hendawe 10 10 silver badges 32 32 bronze badges.

Shyam sundar shah Shyam sundar shah 2, 19 19 silver badges 32 32 bronze badges. Here is another Linq approach which extracts the first number out of a string.

TryParse new string input. IsDigit x. TryParse match. Atters Atters 7 7 silver badges 17 17 bronze badges. Join "", inputString. IsDigit ; Get all numbers in the string.

How to Extract number from a string using C# ?

Using: Please notice how the System. RegularExpressions namespace is included. Return: The Regex. Split method will return the numbers in string form. The result array may also contain empty strings.

Say I have a string such as "20 Boxes" and I want to extract the number from that string as an integer to carry out some calculations on it. How should I go about this?

Converts the numeric Unicode character at the specified position in a specified string to a double-precision floating point number. A String. The numeric value of the character at position index in s if that character represents a number; otherwise, The following code example demonstrates GetNumericValue.

Extract number from string?

You can convert a string to a number by calling the Parse or TryParse method found on the various numeric types int , long , double , etc. Convert class. If you have a string, it is slightly more efficient and straightforward to call a TryParse method for example, int. Parse "11". Using a Convert method is more useful for general objects that implement IConvertible. You can use Parse or TryParse methods on the numeric type you expect the string contains, such as the System. Int32 type. The Convert. ToInt32 method uses Parse internally. The Parse method returns the converted number; the TryParse method returns a Boolean value that indicates whether the conversion succeeded, and returns the converted number in an out parameter.

Python | Extract numbers from string

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C# Regex.Split, Get Numbers From String


string. IsNullOrEmpty(value)) { int i = int. Parse(value); Console. WriteLine("Number: {0}", i); } } } } Output Number: 4 Number: 40 Number: 30 Number: 10 Pattern: \D Non-digit char.


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