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create code fences with backticks ` or tildes ~
```
like so
``` -
add language identifier to highlight code
```python
def function(foo):
print(foo)
``` - put returns between paragraphs
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lang-c
int x;be a declaration? o.O.x = 10;is a statement which performs an assignment and not a definition.int x; int x = 10;at file scope is OK)