What is cross-platform programming, and how does it work?

[robertelite]

A platform is a computing environment in which programming code 
is run. Software: This is determined by the operating system, 
browser, and execution runtimes such as Java or.NET. A 
[cross-platform](https://designprosusa.com/cross-platform-hybrid-mobile-app-development) program is one that can operate on multiple platforms without requiring significant changes.