using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"^(?<nthBase>[+-]?\d+)(?:\*?(?<series>n)(?<crementer>[+-]\d+)?)?$";
string input = @"2n+1
2n
444
-22
+4n
-5*n
-5*n-3
-5n+44
--5
++5
-
+
-6-1
62-1
62n-1
";
RegexOptions options = RegexOptions.Multiline;
foreach (Match m in Regex.Matches(input, pattern, options))
{
Console.WriteLine("'{0}' found at index {1}.", m.Value, m.Index);
}
}
}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for C#, please visit: https://msdn.microsoft.com/en-us/library/system.text.regularexpressions.regex(v=vs.110).aspx