Section 24.100. Math: mathematical functions and constants

24.100. Math: mathematical functions and constants

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24.100.1. Synopsis

Math.constantMath.function( )

24.100.2. Constants

Math.E

The constant e, the base of the natural logarithm.

Math.LN10

The natural logarithm of 10.

Math.LN2

The natural logarithm of 2.

Math.LOG10E

The base-10 logarithm of e.

Math.LOG2E

The base-2 logarithm of e.

Math.PI

The constant π.

Math.SQRT1_2

The number 1 divided by the square root of 2.

Math.SQRT2

The square root of 2.

24.100.3. Static Functions

Math.abs( )

Computes an absolute value.

Math.acos( )

Computes an arccosine.

Math.asin( )

Computes an arcsine.

Math.atan( )

Computes an arctangent.

Math.atan2( )

Computes the angle from the X axis to a point.

Math.ceil( )

Rounds a number up.

Math.cos( )

Computes a cosine.

Math.exp( )

Computes a power 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.

24.100.4. Description

Math is an object that defines properties that refer to useful mathematical functions and constants. These functions and constants are invoked with syntax like this:

 y = Math.sin(x); area = radius * radius * Math.PI; 

Math is not a class of objects as Date and String are. There is no Math( ) constructor, and functions like Math.sin( ) are simply functions, not methods that operate on an object.

24.100.5. See Also

 Number