🛍️ Project: Mini Contact Book using Dictionary

 A contact book stores names and phone numbers.

We will use a dictionary where:

• Key = Contact Name

• Value = Phone Number

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✅ 📌 Project Code: Contact Book

# Simple Contact Book using Dictionary

contacts = {}  # Empty dictionary to store contacts

while True:
    print("\n----- Contact Book -----")
    print("1. Add Contact")
    print("2. View Contact")
    print("3. View All Contacts")
    print("4. Delete Contact")
    print("5. Exit")

    choice = input("Enter your choice: ")

    if choice == "1":
        name = input("Enter name: ")
        number = input("Enter phone number: ")
        contacts[name] = number
        print(f"Contact '{name}' added.")

    elif choice == "2":
        name = input("Enter name to search: ")
        if name in contacts:
            print(f"{name} : {contacts[name]}")
        else:
            print("Contact not found.")

    elif choice == "3":
        if contacts:
            print("\nAll Contacts:")
            for name, number in contacts.items():
                print(f"{name} : {number}")
        else:
            print("No contacts saved.")

    elif choice == "4":
        name = input("Enter name to delete: ")
        if name in contacts:
            contacts.pop(name)
            print(f"Contact '{name}' deleted.")
        else:
            print("Contact not found.")

    elif choice == "5":
        print("Exiting Contact Book... Goodbye!")
        break

    else:
        print("Invalid choice. Try again.")

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🧠 What You Learn from This Project

✔ Creating and using dictionaries
✔ Adding key–value pairs
✔ Updating and deleting items
✔ Looping through dictionaries
✔ Simple user input handling