Regular expression for numbers in string?

You are specifying that it contains at least one digit anywhere not they are all digits. You are looking for the expression d+$ The ^ and $ denote the start and end of the string, respectively. You can read up more on that here Use Regex.

Split to split by any non digit strings. For example: string input = "123&$456"; var isAllDigit = Regex. IsMatch(input, @"^\d+$"); var numbers = Regex.

Split(input, @"^\d+").

You are specifying that it contains at least one digit anywhere, not they are all digits. You are looking for the expression ^\d+$. The ^ and $ denote the start and end of the string, respectively.

You can read up more on that here. Use Regex. Split to split by any non-digit strings.

For example: string input = "123&$456"; var isAllDigit = Regex. IsMatch(input, @"^\d+$"); var numbers = Regex. Split(input, @"^\d+").

It says that it has found it. If you want the whole expression to be checked so : ^0-9+$.

Q1) Both patterns are correct. Q2) Assuming you are looking for a number pattern "5 digits-dot-3 digits-^-4 digits" - here is what your looking for: var regex = new Regex("(?0-9{5})\.(?0-9{3})\^(?0-9{4})"); var match = regex. Match("11111.222^3333"); Debug.

Print(match. Groups"first".ToString()); Debug. Print(match.

Groups"second". ToString Debug. Print(match.

Groups"third". ToString I prefer named capture groups - they will give a more clear way to acces than.

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