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The following table summarizes the support for mathematical computation in JavaScript:
| Function | Object | Type | Description |
|---|---|---|---|
| abs() | Math | Function | Absolute value of a number |
| acos() | Math | Function | Inverse cosine |
| asin() | Math | Function | Inverse sine |
| atan() | Math | Function | Inverse tangent |
| atan2() | Math | Function | Inverse tangent of a slope |
| ceil() | Math | Function | Round up |
| cos() | Math | Function | Cosine of an angle |
| E | Math | Constant | Exponential constant |
| exp() | Math | Function | Exponent function |
| floor() | Math | Function | Round down |
| isFinite() | Global | Function | Test for infinity |
| isNaN() | Global | Function | Test for Not-a-Number |
| LN10 | Math | Constant | Natural log of 10 |
| LN2 | Math | Constant | Natural log of 2 |
| log() | Math | Function | Natural log of a number |
| LOG10E | Math | Constant | Log to the base 10 of e |
| LOG2E | Math | Constant | Log to the base 2 of e |
| max() | Math | Function | Maximum of two values |
| MAX_VALUE | Number | Constant | Maximum numeric value |
| min() | Math | Function | Minimum of two values |
| MIN_VALUE | Number | Constant | Minimum numeric value |
| NaN | Number | Constant | Not a number |
| NEGATIVE_INFINITY | Number | Constant | Negative infinity |
| parseFloat() | Global | Function | Floating point parser |
| parseInt() | Global | Function | Integer parser |
| PI | Math | Constant | The value of PI |
| POSITIVE_INFINITY | Number | Constant | Positive infinity |
| pow() | Math | Function | A value rased to the power of another |
| random() | Math | Function | A random value |
| round() | Math | Function | Truncating round |
| sin() | Math | Function | Sine of an angle |
| sqrt() | Math | Function | Square root |
| SQRT1_2 | Math | Constant | Square toot of one half |
| SQRT2 | Math | Constant | Square root of two |
| tan() | Math | Function | Tangent of an angle |
You should avoid the use of any of these function names as identifiers unless you are intentionally overriding their behavior by adding function properties (methods) to a prototype.
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| Math.tan() | Up | Matrix() |
JavaScript Programmer's Reference, Cliff Wootton Wrox Press (www.wrox.com) Join the Wrox JavaScript forum at p2p.wrox.com Please report problems to support@wrox.com © 2001 Wrox Press. All Rights Reserved. Terms and conditions. | ||