J# is a programming language that was developed by Microsoft and is part of the .NET framework. However J# is no longer actively supported by Microsoft and has been replaced by other languages like C#. Therefore there is no specific way to write Hello World in J#. However you can achieve the same result by using C# instead. Here's an example of how to write Hello World in C#: using System; class Program { static void Main(string[] args) { Console.WriteLine(Hello World); } } Hope this helps! Let me know if you have any other questions. Related topics Setting Up Add-In Development Environment In Share... Hello World App Using Sencha Touch 2 Hello World Program in F# Hello World Using Angularjs in ASP.Net Application Recommended Free Ebook Configure MinRole Search and Cloud Hybrid Features in SharePoint Server 2016 and Office 365 Download Now!