Nan in Java

Nan is a constant value, indicating that an object is not a quantity. However, this value can only exist in values of double and float floating point variables.

The following is a reprinted Article, which is probably sufficient to illustrate this topic:

When I debugged the program today, I accidentally found Nan in the floating point number of Java, and kept a record.

Java code

1. /**
2. * Test the Nan in the Java floating point number.
3. * @ Author ayis
4. *
5. * Feb 23,200 9
6. */
7. Public class testnan {
   
9. Public static
   Void main (string ARGs []) {
11. // There is a nan value in the double and float types
12. Double A = 0, B =
    0, C;
13. C = A/(A + B );
14. System. Out. println (C );
16. // In int and long types, there is no nan value. Release the annotation and an exception will be thrown here ---/by zero
    
17. // Int A = 0, B = 0, C;
18. // C = A/(A + B );
19. // System. Out. println (C );
21. // If Nan is compared with any number, false is returned.
22. If (0> C) | (0 = C) | (0 <C )){
    
23. System. Out. println ("Nan compared with 0 is not always false .");
    
24. } Else {
25. System. Out. println ("Nan compared with 0 is always false! ");
    
26. }
27. }
28. }

/*** Test the Nan * @ author ayis ** Feb 23,200 9 */public class testnan {public static void main (string ARGs []) in the Java floating point number. {// In the double and float types, there are Nan values of Double A = 0, B = 0, C; C = A/(a + B); system. out. println (c); // In the int and long types, there is no nan value. Release the annotation. An exception will be thrown here ---/by zero // int A = 0, B = 0, c; // C = A/(a + B); // system. out. println (c); // returns falseif (0> C) when comparing nan with any number | (0 = C) | (0 <C) {system. out. println ("Nan compared With 0 is not always false. ");} else {system. Out. println (" Nan compared with 0 is always false! ");}}}