Javascript:Guess output of given code

 

Guess what will be the output of the following code snippet:

Code:

    const num1 = Number();

    const num2 = Number(undefined);

    console.log('num1=',num1); // 0

    console.log('num2=',num2); // 0

Output:

    num1= 0

    num2= NaN

Explanation:

In JavaScript, when you call the `Number()` function without any arguments,

it returns `0`. However, when you pass `undefined` to the `Number()` function,

it returns `NaN` (Not-a-Number) because `undefined` cannot be converted to a

valid number.