└── Linear search


/Linear search:
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 1 | def display_menu():
 2 |     print("Dictionary Program")
 3 |     print("1. Look up a word")
 4 |     print("2. Add a new word")
 5 |     print("3. Delete a word")
 6 |     print("4. Display all words")
 7 |     print("5. Exit")
 8 | 
 9 | def look_up_word(dictionary):
10 |     word = input("Enter the word to look up: ").strip()
11 |     if word in dictionary:
12 |         print(f"The meaning of '{word}' is: {dictionary[word]}")
13 |     else:
14 |         print(f"'{word}' not found in the dictionary.")
15 | 
16 | def add_word(dictionary):
17 |     word = input("Enter the word to add: ").strip()
18 |     if word in dictionary:
19 |         print(f"'{word}' already exists in the dictionary with the meaning: {dictionary[word]}")
20 |     else:
21 |         meaning = input(f"Enter the meaning of '{word}': ").strip()
22 |         dictionary[word] = meaning
23 |         print(f"'{word}' has been added to the dictionary.")
24 | 
25 | def delete_word(dictionary):
26 |     word = input("Enter the word to delete: ").strip()
27 |     if word in dictionary:
28 |         del dictionary[word]
29 |         print(f"'{word}' has been deleted from the dictionary.")
30 |     else:
31 |         print(f"'{word}' not found in the dictionary.")
32 | 
33 | def display_all_words(dictionary):
34 |     if dictionary:
35 |         print("Dictionary contents:")
36 |         for word, meaning in dictionary.items():
37 |             print(f"{word}: {meaning}")
38 |     else:
39 |         print("The dictionary is empty.")
40 | 
41 | def main():
42 |     dictionary = {}
43 |     while True:
44 |         display_menu()
45 |         choice = input("Enter your choice: ").strip()
46 |         if choice == '1':
47 |             look_up_word(dictionary)
48 |         elif choice == '2':
49 |             add_word(dictionary)
50 |         elif choice == '3':
51 |             delete_word(dictionary)
52 |         elif choice == '4':
53 |             display_all_words(dictionary)
54 |         elif choice == '5':
55 |             print("Exiting the program. Goodbye!")
56 |             break
57 |         else:
58 |             print("Invalid choice. Please try again.")
59 | 
60 | if __name__ == "__main__":
61 |     main()
62 | 


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