N Number.NaN (Adult web hosting) (Constant/static) Property attributes: ReadOnly, DontDelete,
N Number.NaN (Constant/static) Property attributes: ReadOnly, DontDelete, DontEnum. Cross-references: ECMA 262 edition 2 section 15.7.3.3 ECMA 262 edition 3 section 15.7.3.3 O’Reilly JavaScript Definitive Guide page 37 Number.NaN (Constant/static) A mathematical constant value. Availability: ECMAScript edition 2 JavaScript 1.1 JScript 1.0 Internet Explorer 3.02 Netscape 3.0 Netscape Enterprise Server 2.0 Opera 3.0 Property/method value type: Number primitive JavaScript syntax: -Number.NaN This is a value representing invalid numeric values. It should be identical to the NaN value provided by the Global object in an ECMA-compliant implementation. Refer to the coverage of the NaN topic for full details. However, it is generally considered unreliable to compare against NaN values with a simple equality test. To reliably test whether a numeric value is NaN or a good numeric value, use the isNaN() function and select an appropriate action according to its result. See also: Arithmetic constant, NaN, Number.constructor, Special number values Property attributes: ReadOnly, DontDelete, DontEnum. Cross-references: ECMA 262 edition 2 section 15.7.3.4 ECMA 262 edition 3 section 15.7.3.4 O’Reilly JavaScript Definitive Guide page 37 1557