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