def add_to_dictionary(dictionary, key, value):
# Adding a new key-value pair to the dictionary
dictionary[key] = value
def main():
# Existing dictionary
my_dict = {'a': 1, 'b': 2, 'c': 3}
# Key-value pair to add
new_key = 'd'
new_value = 4
# Adding new key-value pair to the dictionary
add_to_dictionary(my_dict, new_key, new_value)
# Printing the updated dictionary
print("Updated Dictionary:", my_dict)
if __name__ == "__main__":
main()