What is the output of the following code snippet: let x = [1]; x.push(x); console.log(x);?

In the code snippet provided, the first step initializes an array x with a single element, 1. When the push method is called with x itself as the argument, this effectively appends a reference to the array x into itself.

At this point, the contents of the array change. Initially, x holds [1]. After the push(x) operation, the array now contains two elements: the original value 1 and a reference to the array itself (x). This creates a nested structure where the array is now [1, x]. Because x is being referenced in its own definition, it leads to a situation where the second element is the array that contains 1 again, resulting in [1, [1]].

When console.log(x) is executed, it outputs the current state of the array. Therefore, the final output will be [1, [1]]. This reflects the recursive nature of the array where it contains itself, represented as a nested array structure.

This aligns directly with the choice indicating the output as [1, [1]], confirming that the understanding of how arrays can refer to themselves is critical in grasping the