Question

What will be the output of this code?

var x = 21;
var girl = function () {
(x);
var x = 20;
};
girl ();

Answer 1

The code provided will result in an error due to referencing an undeclared variable. If the code is fixed, the output will be undefined.

Step-by-step explanation:

The code provided will result in an error. When the function 'girl' is called, it tries to access the variable 'x' before it is declared and assigned a value. This is known as a 'ReferenceError'. In JavaScript, when a variable is declared using the 'var' keyword, it is hoisted to the top of the function scope, but the assignment of the value remains at its original position.

If we fix the code by declaring and assigning the value of 'x' before it is referenced within the function, the output will be 'undefined'. This is because the local variable 'x' within the function will overshadow the global variable 'x', which remains unchanged at 21.