Math 
mathematical functions and
constants 
Availability
JavaScript
1.0; JScript 1.0; ECMAScript v1
Synopsis
Math.constant
Math.function( )
Constants
 Math.E

The constant e the base of the
natural
logarithms.
 Math.LN10

The natural logarithm of 10.
 Math.LN2

The natural logarithm of 2.
 Math.LOG10E

The base10 logarithm of e
 Math.LOG2E

The base2 logarithm of e
 Math.PI

The constant .
 Math.SQRT1_2

1 divided by the square root of 2.
 Math.SQRT2

The square root of 2.
Static Functions
 Math.abs( )

Computes an absolute
value.
 Math.acos( )

Computes an arc cosine.
 Math.asin( )

Computes an arc sine.
 Math.atan( )

Computes an arc tangent.
 Math.atan2( )

Computes the angle from the Xaxis to a point.
 Math.ceil( )

Rounds a number up.
 Math.cos( )

Computes a cosine.
 Math.exp( )

Computes an exponent of e
 Math.floor( )

Rounds a number down.
 Math.log( )

Computes a natural logarithm.
 Math.max( )

Returns the larger of two numbers.
 Math.min( )

Returns the smaller of two numbers.
 Math.pow( )

Computes x^{y}
 Math.random( )

Computes a random number.
 Math.round( )

Rounds to the nearest integer.
 Math.sin( )

Computes a sine.
 Math.sqrt( )

Computes a square root.
 Math.tan( )

Computes a tangent.
Description
Math is an object that defines properties that refer to useful
mathematical functions and constants. These functions and constants
are conveniently grouped by this Math object and are invoked with
syntax like this:
y = Math.sin(x);
area = radius * radius * Math.PI;
Math is not a class of objects like Date and String are. There is no
Math( ) constructor, and functions like
Math.sin( ) are simply functions, not methods that
operate on an object.
See Also
Number
