JavaScript Math Object Reference

From http://www.w3schools.com (Copyright Refsnes Data)

# JavaScript Math Object Reference

## The Math Object

The Math object allows you to perform mathematical tasks.

Syntax for using properties/methods of Math:

    var pi_value=Math.PI;
    var sqrt_value=Math.sqrt(16);

Note: Math is not a constructor. All properties and methods of Math can be called by using Math as an object without creating it.

## Math Object Properties

FF: Firefox, N: Netscape, IE: Internet Explorer

Property | Description | FF | N | IE
--- | --- | --- | --- | ---
E | Returns Euler's constant (approx. 2.718) | 1 | 2 | 3
LN2 | Returns the natural logarithm of 2 (approx. 0.693) | 1 | 2 | 3
LN10 | Returns the natural logarithm of 10 (approx. 2.302) | 1 | 2 | 3
LOG2E | Returns the base-2 logarithm of E (approx. 1.442) | 1 | 2 | 3
LOG10E | Returns the base-10 logarithm of E (approx. 0.434) | 1 | 2 | 3
PI | Returns PI (approx. 3.14159) | 1 | 2 | 3
SQRT1_2 | Returns the square root of 1/2 (approx. 0.707) | 1 | 2 | 3
SQRT2 | Returns the square root of 2 (approx. 1.414) | 1 | 2 | 3

## Math Object Methods

Method | Description | FF | N | IE
--- | --- | --- | --- | ---
abs(x) | Returns the absolute value of a number | 1 | 2 | 3
acos(x) | Returns the arccosine of a number | 1 | 2 | 3
asin(x) | Returns the arcsine of a number | 1 | 2 | 3
atan(x) | Returns the arctangent of x as a numeric value between -PI/2 and PI/2 radians | 1 | 2 | 3
atan2(y,x) | Returns the angle theta of an (x,y) point as a numeric value between -PI and PI radians | 1 | 2 | 3
ceil(x) | Returns the value of a number rounded upwards to the nearest integer | 1 | 2 | 3
cos(x) | Returns the cosine of a number | 1 | 2 | 3
exp(x) | Returns the value of Ex | 1 | 2 | 3
floor(x) | Returns the value of a number rounded downwards to the nearest integer | 1 | 2 | 3
log(x) | Returns the natural logarithm (base E) of a number | 1 | 2 | 3
max(x,y) | Returns the number with the highest value of x and y | 1 | 2 | 3
min(x,y) | Returns the number with the lowest value of x and y | 1 | 2 | 3
pow(x,y) | Returns the value of x to the power of y | 1 | 2 | 3
random() | Returns a random number between 0 and 1 | 1 | 2 | 3
round(x) | Rounds a number to the nearest integer | 1 | 2 | 3
sin(x) | Returns the sine of a number | 1 | 2 | 3
sqrt(x) | Returns the square root of a number | 1 | 2 | 3
tan(x) | Returns the tangent of an angle | 1 | 2 | 3
toSource() | Represents the source code of an object | 1 | 4 | -
valueOf() | Returns the primitive value of a Math object | 1 | 2 | 4

From http://www.w3schools.com (Copyright Refsnes Data)