# For loops

TODO: ADD MORE

- the `for ... in` concept is useful to loop over the lists [variable-length-quantity](../exercise-concepts/variable-length-quantity.md)
- The example solution uses `for` loops to iterate over various function inputs. [markdown](../exercise-concepts/markdown.md)
- iterating over the passed in `matrix` string using a `for` loop to extract "rows" and "columns" that are appended to a list [matrix](../exercise-concepts/matrix.md)
