NaN - Wikipedia
网页In computing, NaN (/ næn /), standing for Not a Number, is a particular value of a numeric data type (often a floating-point number) which is undefined as a number, such as the result of 0/0.
NAN | definition in the Cambridge English Dictionary - Cambridge …
网页NAN meaning: 1. child's word for a grandmother: 2. a flat bread, typically eaten with South Asian food: 3…. Learn more.
What is nan in Python (float('nan'), math.nan, np.nan)
网页2023年5月9日 · nan is a float value in Python. In Python, the float type includes nan, which can be created using float('nan'). Other creation methods will be described later. print(float('nan')) # nan print(type(float('nan'))) # <class 'float'>. source: nan_usage.py.
What is NaN (Not a Number) in the words of a beginner?
网页2019年12月14日 · 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-point arithmetic. Systematic use of NaNs was introduced by the IEEE 754 floating-point standard in 1985, along with the representation of other non-finite quantities ...
NaN - JavaScript | MDN - MDN Web Docs
网页2024年8月18日 · NaN is a property of the global object. In other words, it is a variable in global scope. In modern browsers, NaN is a non-configurable, non-writable property. Even when this is not the case, avoid overriding it. There are …
NaN - MDN Web Docs Glossary: Definitions of Web-related …
网页2023年6月8日 · NaN (Not a Number) is a numeric data type that means an undefined value or value that cannot be represented, especially results of floating-point calculations.
If it’s not a number, what is it? Demystifying NaN for the working ...
网页2022年3月4日 · Short for "Not a Number", even its name is a paradox. Only floating-point values can be NaN, meaning that from a type-system point of view, only numbers can be "not a number". NaN's actual behavior is even stranger, though. The most spectacular bit of weirdness is that NaN is not equal to itself.
floating point - Why is NaN not equal to NaN? - Stack Overflow
网页The relevant IEEE standard defines a numeric constant NaN (not a number) and prescribes that NaN should compare as not equal to itself. Why is that? All the languages I'm familiar with implement this rule.
What’s the best way to handle NaN values? | by Vasile Păpăluță ...
网页2020年1月12日 · NaN or Not a Number are special values in DataFrame and numpy arrays that represent the missing of value in a cell. In programming languages they are also represented, for example in Python they are represented as None value.
What is the difference between NaN and None? - Stack Overflow
网页2013年7月9日 · NaN is a numeric value, as defined in IEEE 754 floating-point standard. None is an internal Python type ( NoneType ) and would be more like "inexistent" or "empty" than "numerically invalid" in this context.