summerschool_simtech_2023/installation/julia.qmd

# Installing Julia

The recommended way to install julia is [juliaup](https://github.com/JuliaLang/juliaup).
It allows you to, e.g., easily update Julia at a later point, but also test out alpha/beta versions etc.

TLDR; If you dont want to read the explicit instructions, just copy the following command

### Windows
AppStore -> JuliaUp,  or `winget install julia -s msstore` in CMD

### Mac & Linux
`curl -fsSL https://install.julialang.org | sh` in any shell

# Revise.jl
There is a julia-package `Revise.jl` that everyone should install. To do so open a julia REPL (=command line) and execute the following lines:
```julia
using Pkg
Pkg.add("Revise")
```

and that's it. Revise automatically screens the active packages and updates the function if it detects code changes. Similar to `autoreload 2` in ipython.

# VSCode
To install VSCode (the recommended IDE), go to [this link](https://code.visualstudio.com/download) and download + install the correct package.

Next, install the Julia extension

![](https://juliateachingctu.github.io/Julia-for-Optimization-and-Learning/stable/installation/vscodeext_1.png) (thanks to https://juliateachingctu.github.io for providing us with the nice graphics)

Finally press `Ctrl + Shift + P` to get VSCodes command palette, and type in `Julia: Start REPL`
![](https://juliateachingctu.github.io/Julia-for-Optimization-and-Learning/stable/installation/vscodeext_2.png)


# Optional: OhMyREPL
Optionally you cann install a package to give you nicer syntax highlighting in the REPL.

1. Install the package:
`]activate` (without a path after activate, you activate the "global" environment)
`]add OhMyREPL`

2. Add it to your `startup.jl`
Open `.julia/config/startup.jl` or `c:/users/USERNAME/.julia/config/startup.jl` on windows and add
```julia
atreplinit() do repl
    try
        @eval using OhMyREPL
    catch e
        @warn "error while importing OhMyREPL" e
    end
end
```

:tada: ![](https://kristofferc.github.io/OhMyREPL.jl/latest/features/rainbow_brackets.png)