Given three values representing the lengths of the three sides of a triangle, determine whether the triangle is regular (all three sides are equal), symmetric (two sides are equal), or irregular (no two sides are equal).

A possible algorithm is the following: compare the sides two by two, until we have gathered sufficient information to decide the type of the triangle.

The algorithm can be implemented as follows:

double first, second, third; ... if (first == second) { if (second == third) System.out.println("regular"); else System.out.println("symmetric"); } else { if (second == third) System.out.println("symmetric"); else if (first == third) System.out.println("symmetric"); else System.out.println("irregular"); }