Solved | Uncaught SyntaxError: Block-scoped declarations

Question

How to solve this problem?
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Solved the problem, added "use strict" to the beginning;

Answer 1

1. General answer :
declare in global scope,
and initialize in block-scope.

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2. Readings

Regarding closure, here is David Carroll's pick of 3 readings from beginner to advanced:
https://www.sololearn.com/post/45261/?ref=app

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3. If you still need specific answer

Please show your code here so that we can help you
https://www.sololearn.com/post/75089/?ref=app

Answer 2

https://code.sololearn.com/WQ6fIxNEvqgJ/?ref=app