daviddoji/CalculusWithJuliaNotes.jl
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lots of cleanup

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jverzani
2026-08-11 17:17:08 -04:00
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quarto/misc/getting_started_with_julia.qmd
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@@ -25,7 +25,7 @@ There are a few services for running `Julia` through the web. Mentioned here is
[launch binder](https://mybinder.org/v2/gh/CalculusWithJulia/CwJScratchPad.git/master)
Clicking the launch link above will open a web page which provides a blank notebook, save for a package used by these notes. However, `Binder` is nowhere near as reliable as a local installation.
Clicking the launch link above will open a web page which provides a blank notebook, save for a package used by these notes. However, `Binder` is nowhere near as reliable as a local installation; it has timeout issues, memory limitations, and can be slow to load, as would be expected of a free service.
## Installing Julia locally
@@ -49,25 +49,28 @@ The base `Julia` provides a *command-line interface*, or REPL (read-evaluate-par
Once installed, `Julia` can be started by clicking on an icon or typing `julia` at the command line. Either will open a *command line interface* for a user to interact with a `Julia` process. The basic workflow is easy: commands are typed then sent to a `Julia` process when the "return" key is pressed for a complete expression. Then the output is displayed.
A command is typed following the *prompt*. An example might be `2 + 2`. To send the command to the `Julia` interpreter the "return" key is pressed. A complete expression or expressions will then be parsed and evaluated (executed). If the expression is not complete, `julia`'s prompt will still accept input to complete the expression. Type `2 +` to see. (The expression `2 +` is not complete, as the infix operator `+` expects two arguments, one on its left and one on its right.)
The REPL is shown when `Julia` is started from the command line and has a banner that looks like this:
```{julia}
#| eval: false
_
_ _ _(_)_ | Documentation: https://docs.julialang.org
(_) | (_) (_) |
_ _ _| |_ __ _ | Type "?" for help, "]?" for Pkg help.
| | | | | | |/ _` | |
| | |_| | | | (_| | | Version 1.7.0 (2021-11-30)
_/ |\__'_|_|_|\__'_| | Official https://julialang.org/ release
|__/ |
#| echo: false
using REPL
REPL.banner()
```
In the REPL a command is typed following the *prompt*. The prompt would look like `julia> `.
```{julia}
#| eval: false
julia> 2 + 2
4
```
Above, `julia>` is the prompt. These notes will not include the prompt, so that copying-and-pasting can be more easily used. Input and output cells display similarly, though with differences in coloring. For example:
In the above, the command (`2+2`) was sent to the the `Julia` interpreter when the "return" key is pressed. A complete expression or expressions will then be parsed and evaluated (executed). If the expression is not complete, `julia`'s prompt will still accept input to complete the expression. Type `2 +` to see. (The expression `2 +` is not complete, as the infix operator `+` expects two arguments, one on its left and one on its right.)
These notes will not include the prompt, so that copying-and-pasting can be more easily used. Input and output cells display similarly, though with differences in coloring. For example:
```{julia}