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Note: https://julialang.org/ has beautiful and open-source documentation, non-Arch-specific information should be contributed there.

Julia is a high-level, high-performance dynamic programming language for numerical computing. It provides a sophisticated compiler, distributed parallel execution, numerical accuracy, and an extensive mathematical function library.


Install the julia package. To learn and use Julia, please read upstream documents.


If attempting to install ijulia by running Pkg.add("IJulia") gives the warning MbedTLS had build errors. you might need to install the mbedtls package.

Package build errors


Building the Arpack package can result in an error like shown below (stacktrace omitted):

julia> Pkg.build("Arpack")
  Building Arpack → `~/.julia/packages/Arpack/UiiMc/deps/build.log`
┌ Error: Error building `Arpack`:
│ ERROR: LoadError: LibraryProduct(nothing, ["libarpack"], :libarpack, "Prefix(~/.julia/packages/Arpack/UiiMc/deps/usr)") is not satisfied, cannot generate deps.jl!

Use the instructions here to resolve the issue.

Another option is to install julia from julia-binAUR. Then Arpack can be installed from

julia> import Pkg; Pkg.add("Arpack")

Integration with editors


Syntax highlighting and more



The julialint plugin combined with the Lint.jl package can provide linting.


It is recommended that you use a multithreaded BLAS implementation, such as openblas. This can lead to speedups of 10-50x for certain matrix operations.