By definition, NaN is the return value from operations which have an undefined numerical result. Hence why, in JavaScript, aside from being part of the global object, it is also part of the Number object: Number. … It is still a numeric data type , but it is undefined as a real number .

Table of Contents

## What is error NaN?

NaN is an error value that means not a number. However, JavaScript considers the type of NaN to be number. Infinity is a value so big it can’t be represented by JavaScript numbers.

## What does NaN mean JavaScript?

The global NaN property is a value representing Not-A-Number.

## What is NaN in JavaScript with example?

NaN number The number type in JavaScript is a set of all number values, including “Not A Number”, positive infinity and negative infinity. “Not a Number” is a value that does not represent a real number, despite having number type. NaN is useful to represent faulty operations on numbers. The section 3.

## What causes NaN?

“Nan” is produced if a floating point operation has some input parameters that cause the operation to produce some undefined result. For example, 0.0 divided by 0.0 is arithmetically undefined. Finding out the square root of a negative number too is undefined.

## Why is Typeof NaN a number?

The type of NaN , which stands for Not a Number is, surprisingly, a number. The reason for this is, in computing, NaN is actually technically a numeric data type. … So, the name “Not a Number”, doesn’t mean that the value is not numeric. It instead means that the value cannot be expressed with numbers.

## Is NaN equal to NaN?

NaN is not equal to NaN! Short Story: According to IEEE 754 specifications any operation performed on NaN values should yield a false value or should raise an error.

## What is NaN equal to?

But unlike the case with undefined and null where comparing an undefined value to null is true but a hard check(===) of the same will give you a false value, NaN’s behavior is because of IEEE spec that all systems need to adhere to. …

## What does NaN mean on credit score?

NaN is short for Not a Number.

## Is NaN Falsy JavaScript?

A falsy value is something which evaluates to FALSE, for instance when checking a variable. There are only six falsey values in JavaScript: undefined , null , NaN , 0 , “” (empty string), and false of course.

## Is NaN function JavaScript?

JavaScript isNaN() Function The isNaN() function determines whether a value is an illegal number (Not-a-Number). This function returns true if the value equates to NaN. Otherwise it returns false.

## What is NaN in HTML?

The NaN property represents “Not-a-Number” value. This property indicates that a value is not a legal number. The NaN property is the same as the Number. Nan property. Tip: Use the isNaN() global function to check if a value is a NaN value.

## Is NaN a method?

isNaN() method determines whether a value is NaN (Not-A-Number). This method returns true if the value is of the type Number, and equates to NaN. … isNaN() does not convert the values to a Number, and will not return true for any value that is not of the type Number.

## Is NaN in Python?

The math. isnan() method checks whether a value is NaN (Not a Number), or not. This method returns True if the specified value is a NaN, otherwise it returns False.

## Is NaN A C++?

Returns whether x is a NaN (Not-A-Number) value. The NaN values are used to identify undefined or non-representable values for floating-point elements, such as the square root of negative numbers or the result of 0/0. In C, this is implemented as a macro that returns an int value.