functions_built_ins.md

+## Functions:
+
+* use functions if you have to do the same task several times
+
+
+```python
+def my_funct(args, default_arg=1):
+    """Doc string"""
+    function_body = 'That is were the magic happens'
+    return function_body
+```
+
+## Built ins:
+
+* already known to the python interpreter
+* full [list](https://docs.python.org/3/library/functions.html) of python built in functions
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