Property

Description

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constructor

Returns object’s constructor function

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MAX_VALUE

Returns largest (positive) number recognised by the browser’s JavaScript

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MIN_VALUE

Returns smallest (positive) number recognised by the browser’s JavaScript

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NEGATIVE_INFINITY

Represents negative infinity (i.e. if computation overflows)

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NaN

Represents Not-a-Number (i.e. if computation overflows

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POSITIVE_INFINITY

Represents positive infinity (i.e. if computation overflows)

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prototype

Allows author to add properties and methods to an object

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Method

Description

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isFinite()

Returns true if value is a finite number, otherwise returns false

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isInteger()

Returns true if value is of type Number and is an integer (within range understood as integers by the browser), otherwise returns false

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isNaN()

Returns true if value is NaN, otherwise returns false

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isSafeInteger()

Returns true if value is of type Number and is a safe integer, otherwise false. A safe integer is one that can be exactly represented as an IEEE-754 double precision number, i.e. is an integer in the range -(2⁵³ - 1) to (2⁵³ - 1).

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toExponential()

Returns a string representing the number converted into exponential form. The optional parameter (0 to 20) represents the number of digits retained after the decimal point

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toFixed()

Returns a string representing the number with a fixed number of digits after the decimal point

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toPrecision()

Returns a string representing the number with a fixed number of significant digits

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toString()

Returns a string corresponding to the number

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valueOf()

Returns the primitive value of an object. For a number, this in effect just returns the number itself

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Property

Description

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E

Returns Euler’s constant,

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LN2

Returns the natural logarithm of 2

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LN10

Returns the natural logarithm of 10

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LOG2E

Returns the base-2 logarithm of

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LOG10E

Returns the base-10 logarithm of

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PI

Returns

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SQRT1_2

Returns

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SQRT2

Returns

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Method

Description

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abs()

Returns the absolute value of a real number

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acos()

Returns the (principal) arccosine of a real number

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acosh()

Returns the (principal) hyperbolic arccosine of a real number

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asin()

Returns the (principal) arcsine of a real number

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asinh()

Returns the (principal) hyperbolic arcsine of a real number

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atan()

Returns the (principal) arctangent of a real number

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atanh()

Returns the (principal) hyperbolic arctangent of a real number

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atan2()

Returns the arctangent of the specified x- and y-coordinates

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cbrt()

Returns the cube root of a real number

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ceil()

Rounds a real number towards positive infinity

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cos()

Returns the cosine of a real number

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cosh()

Returns the hyperbolic cosine of a real number

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exp()

Returns the exponential of a real number (i.e. )

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floor()

Rounds a real number towards negative infinity

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log()

Returns the natural logarithm of a positive real number

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max()

Returns the maximum of a set of real numbers

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min()

Returns the minimum of a set of real numbers

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pow()

Returns x to the power y. Note, ^ has a different meaning in JavaScript

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random()

Returns a (uniform) random number between 0 and 1

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round()

Rounds a real number to the nearest integer

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sin()

Returns the sine of a real number

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sinh()

Returns the hyperbolic sine of a real number

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sqrt()

Returns the square root of a real (non-negative) number

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tan()

Returns the tangent of a real number

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tan()

Returns the hyperbolic tangent of a real number

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