| -Infinity Global Property | Flash 5 |
| a constant representing an infinitely negative number | read-only |
A number that exceeds the allowed negative numeric value in ActionScript is represented by the numeric constant -Infinity (although incalculable numbers are represented by NaN). The smallest negative value (the one with the largest absolute value) allowed in ActionScript is -Number.MAX_VALUE, which is equivalent to -1.79769313486231e+308. Exceeding the most-negative number representable in ActionScript is known as an underflow condition and is typically caused by a mathematical error.
The result of a calculation that is smaller than (i.e., more negative than) the smallest allowed negative number is -Infinity. For example:
-Number.MAX_VALUE * 2; // Yields -Infinity
-Infinity also results when dividing a negative number by zero:
-1000 / 0; // Yields -Infinity
-Infinity is normally used in place of its more verbose equivalent Number.NEGATIVE_INFINITY.
isFinite( ), NaN, Number.MAX_VALUE, Number.NEGATIVE_INFINITY; "Special Values of the Number Datatype," in Chapter 4
