What is NaN (Not a Number) in the words of a beginner?
Dec 14, 2019 · In computing, NaN, standing for not a number, is a member of a numeric data type that can be interpreted as a value that is undefined or unrepresentable, especially in floating …
python - How to check for NaN values - Stack Overflow
Jun 3, 2009 · A NaN implemented following the standard, is the only value for which the inequality comparison with itself should return True: def is_nan(x): return (x != x) And some examples: …
floating point - Why is NaN not equal to NaN? - Stack Overflow
NaN is designed to propagate through all calculations, infecting them like a virus, so if somewhere in your deep, complex calculations you hit upon a NaN, you don't bubble out a seemingly …
What's the difference between nan, NaN and NAN - Stack Overflow
Jul 24, 2013 · Different operating systems and programming languages may have different string representations of NaN: nan NaN NaN% NAN NaNQ NaNS qNaN sNaN 1.#SNAN 1.#QNAN …
How do you check that a number is NaN in JavaScript?
Apr 16, 2010 · NaN === NaN; // false Number.NaN === NaN; // false isNaN(NaN); // true isNaN(Number.NaN); // true Equality operator (== and ===) cannot be used to test a value …
NaN是什么 NaN == NaN 的结果是什么?为什么? - 知乎
NaN通常用于表示数学运算无法产生有意义的结果的情况，例如0除以0或对负数求平方根等。 NaN与任何其他值（包括NaN本身）进行比较的结果都是false，包括NaN == NaN。这是因 …
c# - what does NaN mean for doubles? - Stack Overflow
Nov 13, 2011 · In computing, NaN (Not a Number) is a value of the numeric data type representing an undefined or unrepresentable value, especially in floating-point calculations. …
math - How to use nan and inf in C? - Stack Overflow
Dec 18, 2009 · NAN may or may not be defined, and "is defined if and only if the implementation supports quiet NaNs for the float type. It expands to a constant expression of type float …
In Java, what does NaN mean? - Stack Overflow
Oct 28, 2015 · if NaN is the input of a floating operation, the output also tends to be NaN. there are several possible values for NaN 0x7fc00000, 0x7fc00001, 0x7fc00002, although x86_64 …
What is the difference between NaN and NA? - Cross Validated
Dec 22, 2010 · NA is for missing data. NaN, as J.M. said is for arithmetic purpose. NaN is usually the product of some arithmetic operation, such as 0/0. NA usually is declared in advance, or is …