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Introduction
Dictionary basics
Dictionaries in loops and conditional statements
Dictionaries in functions
14. Returning dictionaries from functions
Summary

## Instruction

Good. What happens if you don't want to modify the original dictionary? Just like with lists, you can use the copy() function:

def zero_negative(dictionary_to_check):
new_dictionary = dictionary_to_check.copy()
for key in new_dictionary.keys():
if new_dictionary[key] < 0:
new_dictionary[key] = 0
return new_dictionary


Mind that you could use dict() in order to create a copy of the dictionary, similar to what we did in the Working with lists section with the list() function to create a copy of a list. However, there is no difference between copy() and dict() for the chunk of code presented above.

## Exercise

Modify the solution from the previous exercise so that it returns a new dictionary instead of modifying the dictionary passed in as an argument.

### Stuck? Here's a hint!

Inside the function, create a copy of the original dictionary.