7.8. Summary

• There are three number types in ActionScript 3.0, each with different strengths.

• The value NaN represents invalid and unassigned numbers; a Number can be neither undefined nor void.

• Edge cases are handled by special constants in the number classes.

• You can operate on numbers with supported operators.

• Numbers can be typed directly in code in multiple notations.

• Numbers can be converted between numeric types, parsed from strings, and printed into strings.

• The Math utility class contains static methods for arithmetic and trigonometry.

• Math.random() generates pseudorandom numbers between 0 and 1.

• The Date class stores an instant in time.

• Epoch time stores an instant in time as a number.

• You can access and alter a Date instance using many units of time.