I am iterating through a loop, and iterating not by an integer but by a
decimal value, in this case 0.00025. However, after a number of
iterations, the value is off by 0.00000000000001. What's the best way to
round this back to the nearest 10-E5, or does it not matter???
Values such as 0.00025 and many of its multiples are not exactly
representable in double.
Using double for loop control is generally a VERY bad idea. Rounding
errors tend to accumulate. Loop conditions become fuzzy.
It is much better to use an integer for the loop control, and calculate
the value of a double variable from it, e.g. double d = 0.00025*i;
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