code.txt

    var code = true;
    var code = false;


```javascript
var code = true;
```

````md
```
a = 'This is a code block in python'
```
````

~~~
tilde can be used also (github)
~~~

~~~~    ruby startline=3 $%@#$
def foo(x)
  return 3
end
~~~~~~~

~~~~~~~something
code  here
~~~~~~~

```
aaa
~~~
```

  ```javascript
  can be indented
  ```

Inline `code`, and `more code`.