Checking Key Existence in a Dictionary

You can check whether a specific key exists in a dictionary by using the in keyword.

The in keyword returns True or False depending on whether the specified key exists in the dictionary.

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my_dict = {'name': 'CodeFriends', 'age': 30}

# Check if a key exists in the dictionary
key_name = 'name' in my_dict
# Output: True
print(key_name)

key_address = 'address' in my_dict
# Output: False
print(key_address)

The in keyword is useful for performing operations based on conditions or handling exceptions depending on key existence.

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my_dict = {'name': 'CodeFriends', 'age': 30}

if 'email' in my_dict:
    print("Email address exists.")
else:
    print("Email address does not exist.")

Please note that the in keyword only checks for the existence of keys in the dictionary and cannot verify the presence of a value.