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Can I use a JavaScript variable before it is declared?
Yes, you can use a JavaScript variable before it is declared, with a technique called hoisting. The parser read through the complete function before running it.
The behavior in which a variable appears to be used before it's declared is known as hoisting −
For example, the following,
rank = 5; var rank;
The above works the same like the following −
var rank; rank = 2;
Updated on 13-Jun-2020 08:25:59
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