Square matrix

                              
                              Square matrix

    The square matrix is 2D-Array or matrix in which both number of  rows and columns are equal.

Example 1:-
 

  int list[5][5];

X = main diagonal
-  = upper triangular
+ = lower triangular

Example 2 :-

int list[5][5];

main diagonal     = 2,5,5,8,7
upper triangular  = 3,5,8,4,7,9,8,2,3,2
lower triangular  = 2,8,3,3,5,3,7,1,2,5