Fortran

Hello World in Fortran

Every programming journey starts with Hello World. Let’s write our first Fortran program using modern free-form syntax.

The Code

Create a file named hello.f90:

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program hello …

Variables and Types in Fortran

Fortran’s type system reflects its origins as a language built for numerical computation. Every variable must be explicitly declared with a type before use (when following the implicit none best …

def, func, fun, fn, sub: Why Every Language Has a Different Word for the Same Thing

Open almost any programming language reference and you will find, somewhere near the beginning, a section explaining how to define a reusable named block of code. The concept is universal. The word …

The Oldest Programming Languages Still in Production Use

Somewhere right now, a FORTRAN program written in the 1970s is predicting tomorrow’s weather. A COBOL system is processing your credit card transaction. A Lisp-based AI is helping plan a …