Math

Math is different from the other built-in objects because it cannot be used as a constructor to create objects. It's just a collection of static functions and constants. Some examples to illustrate the differences are as follows:

> typeof Date.prototype;
"object"
> typeof Math.prototype;
"undefined"
> typeof String;
"function"
> typeof Math;
"object"

Members of the Math object

Property/method

Description

Math.E

Math.LN10

Math.LN2

Math.LOG2E

Math.LOG10E

Math.PI

Math.SQRT1_2

Math.SQRT2

These are some useful math constants, all read-only. Here are their values:

> Math.E;
2.718281828459045
> Math.LN10;
2.302585092994046
> Math.LN2;
0.6931471805599453
> Math.LOG2E;
1.4426950408889634
> Math.LOG10E;
0.4342944819032518 ...

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