using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"\$\d++(?:\.\d{2}\b|(?!\.\d))";
string input = @"I'm very new to regex and there is something that I really just don't get. Say I have a regex that matches currency in the form $ddd.dd with an optional .dd, which would be ^[$][0-9]{1,3}(\.[0-9]{2})?$. The ^ start and $ end ensure that it won't match a substring in a string like ""$45.3242"" or ""3499,391"". But at the same time, what if I want to match a substring in a string like ""I have $400 in my bank account"" or ""This TV costs $300""? It won't match those either. So I am confused on how I should handle both cases. Is it just one or the other, ^ and $ or no ^ and $? I'd be grateful for any and all advice. Thank you all! $12.34.";
foreach (Match m in Regex.Matches(input, pattern))
{
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