Final answer:
The correct operator to determine whether a key exists in a dictionary is the 'in' operator.
Step-by-step explanation:
The correct operator to determine whether a key exists in a dictionary is the in operator.
For example, if we have a dictionary called my_dict, we can use the in operator to check if a key exists in the dictionary like this:
If the key exists, the condition will evaluate to True, and if it doesn't exist, it will evaluate to False.