# Work with Literate.jl

Franklin works seamlessly with Literate to offer a convenient way to write and maintain tutorials.## Overview

Literate.jl is a convenient package that allows you to write scripts in Julia and convert them to markdown pages or Jupyter notebooks.

You can combine this with Franklin with the `\literate`

command which you can call in Franklin like:

`\literate{/_literate/script.jl}`

it does what you expect:

the markdown is interpreted and evaluated

the code blocks are evaluated and their output can be shown selectively

If you want the script to be shown like a notebook where the output of every code block is shown, use `@def showall = true`

.

Combining Franklin with Literate offers a very convenient way to write and maintain tutorial websites (see for instance the MLJ Tutorials).

### File organisation

We recommend you have a folder `/_literate/`

in your root folder, place your literate scripts there and call them as in the example above.

### Tricks

In the `showall = true`

mode, the last line of each code block is displayed in full. In some cases you will have to think about this a bit more than you would in your REPL and might for instance:

*suppress the output*, in which case you should add a`;`

at the end of the line*only show a few elements*(see below)

For instance you might prefer:

```
x = randn(10)
x[1:3]
```

```
3-element Array{Float64,1}:
-0.49325828198406196
-0.11552895278968883
0.018491708391625016
```

to just

`x = randn(10)`

```
10-element Array{Float64,1}:
0.6538616853497929
-0.10593513912251445
2.6489322943661775
-1.717614333399003
0.43801801468890345
0.052267694249516765
-1.245160083344675
-0.58161923227242
-0.6656390788021661
-2.2307735228662136
```

You can also use `@show`

or `println`

to show specific things beyond the last line

```
x = rand(10)
println(sum(x))
y = 5
```

```
6.927448143373965
5
```

if the last line is a `@show`

or `print`

then only that is shown:

```
x = randn(10)
@show x[1]
```

```
x[1] = -1.3044457294817948
```

## Example

### Script

```
# Some **really cool** maths:
#
# $$ \exp(i\pi) + 1 \quad = \quad 0 $$
#
# We can show this with some code:
x = exp(im*π) + 1
# that looks close to zero but
x ≈ 0
# however
abs(x) < eps()
# #### Conclusion
#
# The equation is proven thanks to our very rigorous proof.
```

### Result

Some**really cool**maths: \[ \exp(i\pi) + 1 \quad = \quad 0 \]

We can show this with some code:

`x = exp(im*π) + 1`

`0.0 + 1.2246467991473532e-16im`

that looks close to zero but

`x ≈ 0`

`false`

however

`abs(x) < eps()`

`true`

#### Conclusion

The equation is proven thanks to our very rigorous proof.