A built-in object that has properties and methods for mathematical constants
and functions. For example, the Math object's PI property has the value
of pi.
Platform Support
| IE | Mozilla | Netscape | Opera | Safari |
|---|---|---|---|---|
| 3.0+ | 1.0+ | 2.0+ | 7.0+ | 1.0+ |
Properties
| Property | Action | IE | Mozilla | Netscape | Opera | Safari |
|---|---|---|---|---|---|---|
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static E : Number
Euler's constant and the base of natural logarithms, approximately 2.718.
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static LN10 : Number
The natural logarithm of 10, approximately 2.302.
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static LN2 : Number
The natural logarithm of 2, approximately 0.693.
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static LOG10E : Number
The base 10 logarithm of E (approximately 0.434).
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static LOG2E : Number
The base 2 logarithm of E (approximately 1.442).
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static PI : Number
The ratio of the circumference of a circle to its diameter, approximately
3.14159.
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static SQRT1_2 : Number
The square root of 1/2; equivalently, 1 over the square root of 2, approximately
0.707.
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static SQRT2 : Number
The square root of 2, approximately 1.414.
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Functions
| Method | Action | IE | Mozilla | Netscape | Opera | Safari |
|---|---|---|---|---|---|---|
|
static abs(Number x) : Number
Returns the absolute value of a number.
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static acos(Number x) : Number
Returns the arccosine (in radians) of a number.
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static asin(Number x) : Number
Returns the arcsine (in radians) of a number.
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static atan(Number x) : Number
Returns the arctangent (in radians) of a number.
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static atan2(Object y, Object x) : Number
Returns the arctangent of the quotient of its arguments.
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static ceil(Number x) : Number
Returns the smallest integer greater than or equal to a number.
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static cos(Number x) : Number
Returns the cosine of a number.
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static exp(Number x) : Number
Returns Ex, where x is the argument, and E is Euler's constant, the base
of the natural logarithms.
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static floor(Number x) : Number
Returns the largest integer less than or equal to a number.
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static log(Number x) : Number
Returns the natural logarithm (base E) of a number.
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static max(Number x, Number y) : Number
Returns the larger of two numbers.
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static min() : Number
Returns the smaller of two numbers.
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static pow() : Number
Returns base to the exponent power, that is, baseexponent.
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static random() : Number
Returns a pseudo-random number in the range [0,1) -- that is, between 0
(inclusive) and 1 (exclusive). The random number generator is seeded from
the current time, as in Java.
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static round(Number x) : Number
Returns the value of a number rounded to the nearest integer.
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static sin(Number x) : Number
Returns the sine of a number.
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static sqrt(Number x) : Number
Returns the square root of a number.
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static tan(Number x) : Number
Returns the tangent of a number.
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Remarks
All properties and methods of Math are static. You refer to the constant pi as Math.PI and you call the sine function as Math.sin(x), where x is the method's argument. Constants are defined with the full precision
of real numbers in JavaScript.
It is often convenient to use the with statement when a section of code
uses several Math constants and methods, so you don't have to type "Math" repeatedly.
For example,
with (Math) {
a = PI * r*r
y = r*sin(theta)
x = r*cos(theta)
}
References
Availability
JavaScript 1.0|JScript 1.0|ECMAScript v1