Syntax error What is "undefined x 1" in JavaScript?

What is "undefined x 1" in JavaScript?

This is not a feature of JavaScript but is Chrome's way of displaying uninitialized indexes in arrays (and array-like objects). For example, if you console.log the following −

Example

console.log(Array(100))

Output

[undefined × 100]

This is better than printing [undefined, undefined, undefined,...] as it is more readable.

Updated on: 2019-09-16T08:03:51+05:30

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