Please visit JuliaLang/Downloads to download and install Julia.
Tip: platform-specific instructions can help with post-installation conveniences such as launching Julia by typing julia in the terminal.
Julia consists of a Base library and is also shipped with a standard set of libraries. One example of these is LinearAlgebra.
To use a standard library package such as LinearAlgebra, just type using LinearAlgebra at the julia> prompt. To see what a package contains, type LinearAlgebra.<TAB>. This will show you all the types and functions that are declared within.
To add a registered package from the Julia community's ecosystem hosted on GitHub, switch from execution mode (julia>) to package mode ((@v1.6) pkg> ) by typing ]. Add Pluto.jl by typing add Pluto followed by enter. This may take a while as it initializes your package environment for the first time. To exit package mode, press backspace. Let's also add Plots as it's used in the first notebook.
To use Pluto, type using Pluto; Pluto.run(). This will open the Pluto landing page in your default browser (and by default at the local web address http://localhost:1234). Here, you can take a look at a few sample notebooks, start a new notebook, and even open a notebook that's hosted on the Internet by pasting the link in the Open from file box.
For a short YouTube video that shows these steps, please see here.
Our Pluto notebooks can also be viewed statically by downloading the PDF file or by using a GitHub HTML viewer: