Flash MX 2004 Games : Art to ActionScript

Flash MX 2004 Games
153 = 9.99999999999998e-311
154 = 9.99999999998466e-313
155 = 9.99999999963881e-315
156 = 9.99999983659715e-317
157 = 9.99998748495601e-319
158 = 9.99988867182684e-321
159 = 9.88131291682494e-323
160 = 0
After the 160th iteration, the value becomes zero. This may seem unlikely, but a computer would
whiz through the calculation in a blink of an eye. Once the value has diminished to zero the
quantity has disappeared. If the intention was to use the result to multiply another variable then
this too will become zero. Floating-point errors like this are another source of difficult-to-locate
bugs in a program. Always remember that unless you are working with integers within a sensible
range, all other values are approximate. You may test two floating-point values to see if they are
the same, using
if (number1==number2){
//Do something
}
Although this would work fine for integers, don’t use it for floats. Instead use
if (((number1 - number2)*(number1 - number2))