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create code fences with backticks ` or tildes ~
```
like so
``` -
add language identifier to highlight code
```python
def function(foo):
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lang-bash
word="Hi All"like the other examples, it returnsha, nothi all. It only works for the capitalized letters and skips the already-lowercased letters.trandawkexamples are specified in the POSIX standard.tr '[:upper:]' '[:lower:]'will use the current locale to determine uppercase/lowercase equivalents, so it'll work with locales that use letters with diacritical marks.b="$(echo $a | tr '[A-Z]' '[a-z]')"