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Ch. 4: Clarify definition on reference/variable scope (#4706) #4708

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Ch. 4: Clarify definition on reference/variable scope (#4706) #4708

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6 changes: 4 additions & 2 deletions src/ch04-02-references-and-borrowing.md
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Expand Up @@ -171,8 +171,10 @@ from under them! However, multiple immutable references are allowed because no
one who is just reading the data has the ability to affect anyone else’s
reading of the data.

Note that a reference’s scope starts from where it is introduced and continues
through the last time that reference is used. For instance, this code will
Note that a reference's scope is different from the variable scope we discussed
earlier. While a variable's scope extends to the end of the block where it is declared,
a reference's scope starts from where it is introduced and continues through
the last time that reference is used. For instance, this code will
compile because the last usage of the immutable references is in the `println!`,
before the mutable reference is introduced:

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