infinity

I have come across with the following two codes. Why does it not throw an exception for floating point where as in other case it will throw a runtime exception. class FloatingPoint { public static void main(String [] args) { float a=1000f; float b=a/0; System.out.println("b=" +b); } } OUTPUT:b=Infinity . If I try with int values then it will throw a runtime exception. Why is it like this? polygenelubricants The short answer Integral types ( JLS 4.2.1 ) are categorically different from floating point types ( JLS 4.2.3 ). There may be similarities in behavior and operations, but there are also

I'm using MSVC++, and I want to use the special value INFINITY in my code. What's the byte pattern or constant to use in MSVC++ for infinity? Why does 1.0f/0.0f appear to have the value 0? #include <stdio.h> #include <limits.h> int main() { float zero = 0.0f ; float inf = 1.0f/zero ; printf( "%f\n", inf ) ; // 1.#INF00 printf( "%x\n", inf ) ; // why is this 0? printf( "%f\n", zero ) ; // 0.000000 printf( "%x\n", zero ) ; // 0 } Use numeric_limits : #include <limits> float maxFloat = std::numeric_limits<float>::infinity(); peterchen printf("%x\n", inf) expects an integer (32 bit on MSVC), but

I need a way to represent an integer number that can be infinite. I'd prefer not to use a floating point type (double.PositiveInfinity) since the number can never be fractional and this might make the API confusing. What is the best way to do this? Edit: One idea I haven't seen yet is using int? with null representing infinity. Are there any good reasons not to do this? If you don't need the full range of integer values, you can use the int.MaxValue and int.MinValue constants to represent infinities. However, if the full range of values is required, I'd suggest either creating a wrapper class

I have a problem when running with Meteor. I have a "question" page which I want to increase the count view whenever it is rendered. So in my template function I write Template.questionview.helpers({ question : function() { if(Session.equals('main_template_name', 'question')) { console.log(Session.get('question_id')); Questions.update({ _id: Session.get('question_id') }, { $inc: { views: 1 } }); } }); Now here comes the problem, when I render the question view and update the question item, the view is refreshed again because it is a reflective page. And then it comes infinity loop. Anyone has

The gnuplot command set datafile missing "nan" tells gnuplot to ignore nan data values in the data file. How to ignore both nan and -nan ? I tried the following in gnuplot, but then the effect of the first statement is overwritten by the next. gnuplot> set datafile missing "-nan" gnuplot> set datafile missing "nan" Is it possible to somewhow embed a grep -v nan in the gnuplot command, or even some kind of regexp to exclude any imaginable non-numerical data? Christoph It is not possible to use a regexp for set datafile missing , but you can use any program to filter you data before plotting,

Why doesn't infinity comparison follow the logic applied to NaNs? This code prints out false three times: double a = Double.NaN; double b = Double.NaN; System.out.println(a == b); // false System.out.println(a < b); // false System.out.println(a > b); // false However, if I change Double.NaN to Double.POSITIVE_INFINITY , I get true for equality, but false for the greater-than and less-than comparisons: double a = Double.POSITIVE_INFINITY; double b = Double.POSITIVE_INFINITY; System.out.println(a == b); // true System.out.println(a < b); // false System.out.println(a > b); // false This seems