public class MyClass {
private static double CalculateNormal(int[][] matrix) {
int normal = 0;
for (int i = 0; i < matrix.length; i++) {
for (int j = 0; j < matrix.length; j++) {
normal += matrix[i][j] * matrix[i][j];
}
}
return Math.sqrt(normal);
}
private static int CalculateTrace(int[][] matrix) {
int trace = 0;
for (int i = 0; i < matrix.length; i++) {
trace += matrix[i][i];
}
return trace;
}
public static void main(String args[]) {
int[][] matrix =
{
{1, 1, 1, 1, 1},
{2, 2, 2, 2, 2},
{3, 3, 3, 3, 3},
{4, 4, 4, 4, 4},
{5, 5, 5, 5, 5}
};
System.out.println(CalculateTrace(matrix));
System.out.println(CalculateNormal(matrix));
}
}
/*
run:
15
16.583123951777
*/
