The following table lists predefined JavaScript constants that you can use in expressions.
Syntax Constants Constant Description JavaScript object E The mathematical constant e. This is Euler’s number, the base of natural logarithms. Math Infinity A value that is larger than the largest floating point number. Negative Infinity (-Infinity) is smaller than the smallest floating point number. Global LN2 The natural logarithm of 2. Math LN10 The natural logarithm of 10. Math LOG2E The base-2 logarithm of e. Math LOG10E The base-10 logarithm of e. Math MAX_VALUE The largest number that can be represented in JavaScript. Number MIN_VALUE The closest number to zero that can be represented in JavaScript. Number NaN Indicates that an arithmetic expression returned a value that is not a number. Number NaN (Global) A value that indicates that an expression is not a number. Global NEGATIVE_INFINITY A value that is smaller than the smallest floating point number. Number null Constant The value of a variable that does not point to valid data. Global PI Pi. This is the ratio of the circumference of a circle to its diameter. Math POSITIVE_INFINITY A value that is larger than the largest floating point number. Number SQRT1_2 The square root of 0.5, or, equivalently, one divided by the square root of 2. Math SQRT2 The square root of 2. Math undefined The value of a variable that has been declared but not initialized. Global See also Other articles AttributionsMicrosoft Developer Network: Article
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