# Special/extreme cases in Math

Joyce Lee
Ranch Hand
Posts: 1392
Hi,
For the exam, to what extent do I need to know about the special cases in Math?
I've summarized the outputs for the Math methods with the arguments:NaN, NEGATIVE_INFINITY, POSITIVE_INFINITY, MIN_VALUE, MAX_VALUE and value less than 0. Is that good enough? If not, how extreme cases do I need to know?
In KnB book of page 375, it mentions that "There are many more, but if you know these you will be in good shape for the exam." What are these special cases?
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double nan = Double.NaN;
double n_i = Double.NEGATIVE_INFINITY;
double p_i = Double.POSITIVE_INFINITY;
double min_v = Double.MIN_VALUE;
double max_v = Double.MAX_VALUE;
double neg_v = -0.5;
sin(nan), sin(n_i), sin(p_i), sin(min_v), sin(max_v), sin(neg_v)
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Many thanks in advance.
Joyce

Andres Gonzalez
Ranch Hand
Posts: 1561
couple more to add
-Double.MIN_VALUE represents the smallest positive value that is greater than zero.
-Float.MIN_VALUE represents the smallest positive value that is greater than zero

Joyce Lee
Ranch Hand
Posts: 1392
Thank Andres for the input.
I read the topic "Expressions" from Java Language Specification (2nd Edition) and realized that there're many other Math special cases. Well, it's really worth taking a look...but as for memorization...Hmmm...
Joyce