C# Program to Illustrate Regular Expression Pattern

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This is a C# Program to illustrate regular expression pattern.

Problem Description

This C# Program Illustrates Regular Expression Pattern.

Problem Solution

Here the Regex class is used for representing a regular expression and the words that start with the given letter is displayed.

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Program/Source Code

Here is source code of the C# Program to Illustrate Regular Expression Pattern. The C# program is successfully compiled and executed with Microsoft Visual Studio. The program output is also shown below.

/*
 * C# Program to Illustrate Regular Expression Pattern
 */
using System;
using System.Text.RegularExpressions;
namespace Application
{
    class Program
    {
        private static void showMatch(string text, string expr)
        {
            Console.WriteLine("The Expression : " + expr);
            MatchCollection m = Regex.Matches(text, expr);
            foreach (Match m1 in m)
            {
                Console.WriteLine(m1);
            }
        }
        static void Main(string[] args)
        {
            string str = "Sanfoundry , a high end Technology Training company";
            Console.WriteLine("Matching words that start with 'S': ");
            showMatch(str, @"\bS\S*");
            Console.ReadKey();
        }
    }
}
Program Explanation

This C# program is used to illustrate regular expression pattern. We have defined a sentence in ‘str’ string variable. Then we are calling the showMatch() procedure by passing the str and expr variable values as an argument.

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The showMatch() procedure is used to find the matching words that start with ‘S’. Here the Regex class is used for representing a regular expression and the words that start with the given letter are displayed.

Runtime Test Cases
 
Matching Words that Starts With 'S' : 
The Expression : \bs\s*
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Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He is Linux Kernel Developer & SAN Architect and is passionate about competency developments in these areas. He lives in Bangalore and delivers focused training sessions to IT professionals in Linux Kernel, Linux Debugging, Linux Device Drivers, Linux Networking, Linux Storage, Advanced C Programming, SAN Storage Technologies, SCSI Internals & Storage Protocols such as iSCSI & Fiber Channel. Stay connected with him @ LinkedIn