constants
Summary
Math constants return constant values that are properties of the Math object.
Syntax
Examples
The following example illustrates how to use the Math.PI constant.
var radius = 3;
var area = Math.PI * radius * radius;
document.write(area);
// Output: 28.274333882308138
Math Object Constants
The following table lists constant values that are properties of the Math object.
| Constant | Description | Approximate value |
|---|---|---|
| Math.E | The mathematical constant e. This is Euler’s number, the base of natural logarithms. | 2.718 |
| Math.LN2 | The natural logarithm of 2. | 0.693 |
| Math.LN10 | The natural logarithm of 10. | 2.302 |
| Math.LOG2E | The base-2 logarithm of e. | 1.443 |
| Math.LOG10E | The base-10 logarithm of e. | 0.434 |
| Math.PI | Pi. This is the ratio of the circumference of a circle to its diameter. | 3.14159 |
| Math.SQRT1_2 | The square root of 0.5, or, equivalently, one divided by the square root of 2. | 0.707 |
| Math.SQRT2 | The square root of 2. | 1.414 |
See also
Other articles
Attributions
Microsoft Developer Network: Article