Declaring Multiple Variables in a Single Statement in JavaScript

Consider the following code snippet:

let count = length, temp, index;

In this code, the variable count receives 3 values separated by commas. What is the final value of count?

Variable declarations (var, let, and const) support declaring multiple variables in a single statement. Each additional variable beyond the first is separated by a comma. These variables may or may not be defined with an initial value using the assignment operator (=), except in the case of const, where it's required.

The statement

let count = length, temp, index;

is effectively equivalent to

let count = length;
let temp;
let index;

So, the value of count will be length.