1    package math.linearAlgebra.util; 
2     
3    public class Maths { 
4     
5       /** sqrt(a^2 + b^2) without under/overflow. **/ 
6     
7       public static double hypot(double a, double b) { 
8          double r; 
9          if (Math.abs(a) > Math.abs(b)) { 
10            r = b/a; 
11            r = Math.abs(a)*Math.sqrt(1+r*r); 
12         } else if (b != 0) { 
13            r = a/b; 
14            r = Math.abs(b)*Math.sqrt(1+r*r); 
15         } else { 
16            r = 0.0; 
17         } 
18         return r; 
19      } 
20   } 
21