The JavaScript Math object is built-in to JavaScript and includes mathematical constants and functions. The Math object is not a constructor. Unlike other objects, it is not necessary to create the Math
object before using it.
String Object Syntax
var a = Math.property;
document.write(Math.method);
Math Object Properties
JavaScript provides eight mathematical properties (constants) that can be accessed from the Math object.
| Property | Description |
|---|
| E | The mathematical constant e. This is Euler's number; the base of natural logarithms. |
| LN2 | The natural logarithm of 2. |
| LN10 | The natural logarithm of 10. |
| LOG2E | Base 2 logarithm of E. |
| LOG10E | Base 10 logarithm of E. |
| PI | Returns the ratio of the circumference of a circle to its diameter; PI. |
| SQRT1_2 | The square root of 1/2. |
| SQRT2 | The square root of 2. |
Here is an example of how to use the PI property:
document.write(Math.PI);
Math Object Methods
The following table lists the methods of the Math object.
| Method | Description |
|---|
| abs(x) | Returns the absolute value of x. |
| acos(x) | Returns the arccosine of x. |
| asin(x) | Returns the arcsine of x. |
| atan(x) | Returns the arctangent of a number. |
| atan2(y,x) | Returns the angle from the X axis to a point represented by the supplied y and x coordinates. |
| ceil(x) | Returns x, rounded upwards to the nearest integer. |
| cos(x) | Returns the cosine of x. |
| exp(x) | Returns e raised to a power. |
| floor(x) | Returns x, rounded downwards to the nearest integer. |
| log(x) | Returns the natural logarithm of x |
| max(x,y,z,...,n) | Returns the number with the highest value. |
| min(x,y,z,...,n) | Returns the number with the lowest value. |
| pow(x,y) | Returns the value of x to the power of y. |
| random() | Returns a random number between 0 and 1 |
| round(x) | Rounds x to the nearest integer. |
| sin(x) | Returns the sine of x. |
| sqrt(x) | Returns the square root of x. |
| tan(x) | Returns the tangent of an angle. |
Here is an example of how to use the Math max method:
document.write(Math.max(5,7,9,10,2,1));
Always keep in mind that JavaScript is case sensitive.
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