How do I find the last number in a string c#?

Question

I have a string that can have values like

"1 Of 1"
"2 Of 4"
"8 Of 10"

etc.

I want the value of the last number in the string, ie, 1 , 4 , 10 .

Would Regex \\d+$ work?

Answer 1

您可以使用var lastno = input.Split().Last();

Answer 2

You can also do this without regex as follows:

string s = "1 Of 1"
string[] words = s.Split(' ');
words[words.Length - 1]

And to answer your question, YES, it does work. (Although, I must say, Blorgbeard raises an excellent point)

"1 Of 1"  ==> '\d+$' ==> "1"
"1 Of 4"  ==> '\d+$' ==> "4"
"1 Of 10" ==> '\d+$' ==> "10"

Answer 3

For example,

string value = "8 Of 10";
value = value.Substring(value.IndexOf('f') + 2, value.Length)

Answer 4

Yes it would but a little cut off at last!

string[] inputs = new[] {"1 Of 1","2 Of 4", "8 Of 10"};
    foreach (var input in inputs)
       {
         string[] numbers = Regex.Split(input, @"\D+");
         Console.WriteLine("Last Number from input \"{0}\" is: {1}", 
                            input,numbers[numbers.Length-1]);
       }

Answer 5

You can use this code.It will give perfect output.

string str = "10 OF 10";
    int pos = str.IndexOf("F");
    string str1 = str.Substring(pos + 1);
    Console.Write(str1);

Answer 6

Use this RegEx:

var SearchString = @"8of10";

var x = Regex.Match(SearchString, @"([0-9]+)[^0-9]*$");

if (x.Success && x.Groups.Count > 0)
{
    var foundNumber = x.Groups[1].Captures[0].Value;
}

Answer 7

**regexp { ([0-9])( |\t)*([a-zA-Z]+)( |t)*([0-9])$} $x A B C D E F** ( tcl)

The value of the last digit will be stored in the variable F.