Learn FORTRAN with Real Code Examples
Updated Nov 20, 2025
Practical Examples
Matrix multiplication
Numerical integration
Weather simulation module
Finite element analysis
Vectorized linear algebra
Troubleshooting
Check compiler flags
Verify array bounds
Ensure correct module use
Debug with print statements or gdb
Check for floating-point errors
Testing Guide
Unit test with assert statements
Check array bounds and outputs
Use regression tests for scientific calculations
Compare against analytical solutions
Validate parallel execution correctness
Deployment Options
Compile executables
Deploy in HPC clusters
Embed in pipelines for simulations
Link with scientific libraries
Package as modules for reuse
Tools Ecosystem
gfortran (GNU Fortran)
Intel Fortran Compiler
PGI Fortran
OpenMP/MPI libraries
Fortran IDEs (Photran, Code::Blocks)
Integrations
C/C++ via ISO_C_BINDING
Python via f2py
MPI/OpenMP parallel libraries
NetCDF/HDF5 for scientific data
Visualization tools like Matplotlib (via Python interface)
Productivity Tips
Use compiler optimizations
Vectorize arrays
Parallelize loops
Reuse modules
Automate build & testing
Challenges
Matrix multiplication
Numerical integration
Solve differential equations
Parallelize a physics simulation
Optimize legacy Fortran code