While dedicated standalone Fortran 77 (F77) compilers are largely a thing of the past, you can still run and compile F77 code on Windows 10 (64-bit) using modern, free tools that include F77 support as part of their legacy standards. 1. GFortran (via MinGW-w64)

is largely outdated, newer tools provide seamless support for F77 standards. Top Free Recommendations Installing GFortran — Fortran Programming Language

Extract the .7z file using (free) to a folder like C:\mingw64 .

The Open Watcom Fortran Compiler is a free and open-source compiler that supports Fortran 77, Fortran 90, and Fortran 95. It's a great option for developers who want a reliable and efficient compiler.

: Easily installs other tools (make, git, python, etc.) via pacman .

Extremely fast compilation, excellent error messages. Cons: Free version is 32-bit only (but runs fine on Windows 10 64-bit), and the generated EXEs require a runtime DLL (salford.dll).

Fortran 77 is a high-level, compiled programming language widely used in scientific and numerical computing. Although it's an older language, it still has a significant following in various fields, including physics, engineering, and mathematics. If you're looking for a Fortran 77 compiler for Windows 10 64-bit, this article will guide you through the process of downloading and installing a free and reliable compiler.