What will the following code output: console.log(typeof NaN)?

The output of the code console.log(typeof NaN) is indeed "number". This is because, in JavaScript, NaN stands for "Not a Number", which might suggest that it represents a non-numeric value. However, NaN is actually a special value of the Number type.

When you use the typeof operator to check the type of NaN, it will return "number" indicating that NaN is categorized as a type of number within JavaScript, adhering to the underlying data type definitions. This is an important aspect of how JavaScript handles numeric values and represents cases where calculations fail to produce valid numbers.

The other potential answers do not apply here:

• "undefined" is a type that represents a variable that has been declared but has not yet been assigned a value.
• "object" is a broader type category used in JavaScript for complex data structures but does not correctly classify NaN.
• "NaN" itself is the value interpreted as “Not a Number” but not a type output by the typeof operator, thus it cannot be the correct answer in response to the typeof check.

Understanding this behavior is crucial for recognizing how JavaScript's type system is designed and helps in