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What is a dictionary? | Year 4 English PDF Download
Understanding Dictionaries
- Definition of a Dictionary: A dictionary is a reference book or online resource containing an alphabetical list of words or terms with information about them, typically including definitions, pronunciations, etymologies, and other details.
- Organization in Alphabetical Order: In a dictionary, words are arranged in alphabetical order. This means that words starting with 'a' will be found towards the beginning, while words beginning with 'z' will be towards the end.
- Importance of Alphabetical Order: Alphabetical order is crucial in dictionaries. It is not just the first letter that matters; words are organized based on subsequent letters as well.
- Example of Alphabetical Order: For instance, in an English dictionary, 'ant' will be listed after 'ankle' even though they share the same initial letters 'an'. This is because 't' comes after 'k' in the alphabet.
Question for What is a dictionary?Try yourself: What is the primary method of organization used in dictionaries?View Solution
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FAQs on What is a dictionary? - Year 4 English
| 1. What is a dictionary? |  |
Ans. A dictionary is a collection of data stored as key-value pairs, where each key is unique and associated with a specific value.
| 2. How can dictionaries be used in programming? | |
Ans. Dictionaries are commonly used in programming to store and retrieve data efficiently. They allow for quick access to values based on their corresponding keys.
| 3. Can a dictionary have duplicate keys? | |
Ans. No, a dictionary cannot have duplicate keys. Each key in a dictionary must be unique, but the values associated with the keys can be duplicated.
| 4. How do you access values in a dictionary? | |
Ans. Values in a dictionary can be accessed by specifying the corresponding key within square brackets, similar to accessing elements in a list.
| 5. What are some common methods used with dictionaries in Python? | |
Ans. Some common methods used with dictionaries in Python include keys() to retrieve all keys, values() to retrieve all values, and items() to retrieve key-value pairs as tuples.
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Nov 21, 2024 Last updated |
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