Write a Python program to Find Highest and Lowest Value in a Dynamic Dictionary

data = {}

while True:
    print("\n--- Dictionary Menu ---")
    print("1. Add / Update Element")
    print("2. Display Dictionary")
    print("3. Find Highest & Lowest Value")
    print("4. Exit")

    choice = int(input("Enter your choice: "))

    if choice == 1:
        key = input("Enter key: ")
        value = int(input("Enter numeric value: "))
        data[key] = value
        print("Element added/updated successfully")

    elif choice == 2:
        if len(data) == 0:
            print("Dictionary is empty")
        else:
            print("Dictionary:", data)

    elif choice == 3:
        if len(data) == 0:
            print("Dictionary is empty")
        else:
            highest = None
            lowest = None

            for v in data.values():
                if highest is None or v > highest:
                    highest = v
                if lowest is None or v < lowest:
                    lowest = v

            print("Highest Value:", highest)
            print("Lowest Value:", lowest)

    elif choice == 4:
        print("Program terminated")
        break

    else:
        print("Invalid choice")