Matrix Upper Triangle and Lower Triangle in Python | Python Matrix Problems | Interview Preparation

Upper Triangle:
The upper triangle of a matrix includes all the elements located above the main diagonal, including the diagonal itself.
The main diagonal of a matrix consists of the elements from the top-left to the bottom-right (inclusive).
The upper triangle contains all elements to the right and above the main diagonal, while elements below the diagonal are not included.

Lower Triangle:
The lower triangle of a matrix includes all the elements located below the main diagonal, including the diagonal itself.
Similar to the upper triangle, the main diagonal consists of the elements from the top-left to the bottom-right (inclusive).
The lower triangle contains all elements to the left and below the main diagonal, while elements above the diagonal are not included.