What will the output be in the console for the statement console.log(x); var x = 10;?

In this scenario, understanding JavaScript's hoisting behavior is crucial. When the console.log(x); var x = 10; statement is executed, the declaration of the variable x is hoisted to the top of its scope. This means that the variable x is recognized and created, but it is not initialized until the line where it is assigned the value of 10 is executed.

As a result, by the time the console.log(x); line executes, x has been declared but not yet assigned any value, which leads to its value being undefined. Therefore, when you attempt to log x to the console, it outputs undefined, reflecting the lack of an assigned value up to that point in the code.

This behavior is a key aspect of how variable scoping works in JavaScript, particularly with var, which behaves differently than let or const. Understanding this will help clarify many similar scenarios you might encounter while working with JavaScript.