#common block

[learnsharewithdp]

How to Use Global Variables in Fortran (Modern Way)

If you’re coming from languages like C or Python, you might wonder: how do I declare global variables in Fortran? In modern Fortran (90 and later), the recommended approach is to use modules. These allow you to define shared variables accessible across multiple program units—just like global variables. ✅ Recommended: Use a Module Here’s how to define and use global variables using a…