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JavaScript Constants

The following table lists predefined JavaScript constants that you can use in expressions.

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 (JavaScript)

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

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