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# primes={1:2,2:3,4:5,6:11} print (primes [primes [4]]

What is the output? And how? Explain plZ

9 Answers

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Mhr Habib Great, you already have half or your answer by yourself. And Jomari explained why

+ 2

Why don't you try it yourself?!

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Its giving me a key error in the playground but in the lecture its gives output of 11

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This would result in an error.
primes[4] resolves to 5, while primes[5] is missing.
Basically, what happens here is that the `thing` inside the bracket is the KEY for the dictionary to get its value.
primes[4] is 5 because you declared 4:5. primes[5] on the other hand is not present.

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Jomari pantorilla have you seen the dictionary functon first question

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@Mhr Habib What do you mean by if I "saw the dictionary function"?
Have you checked again if maybe you've made a typo? If 6:11 becomes 5:11 instead, then the expected output of 11 would be correct.

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If it is indexing... Then my thinking is correct ...output is 11 ..

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Oh. Maybe you're mixing up arrays and dicts?

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Mhr Habib Dictionaries are unordered and don't support indexing. If you could use indices, you couldn't tell if primes[1] referred to the value with the key 1 (2) or the second value (3).
Since the prime number 7 is missing, I also think that the dictionary in your question is incomplete.