Sum of elements below main diagonal of matrix
The matrix should be square matrix.
Matrix = [[1,3,7,8,10],
Sum of elements below main diagonal of matrix is a draft programming task. It is not yet considered ready to be promoted as a complete task, for reasons that should be found in its talk page.
- Task
- Find sum of elements below main diagonal of matrix.
[2,4,16,14,4], [3,1,9,18,11], [12,14,17,18,20], [7,1,3,9,5]]
Ring
<lang ring> see "working..." + nl see "Sum of elements below main diagonal of matrix:" + nl diag = [[1,3,7,8,10],
[2,4,16,14,4], [3,1,9,18,11], [12,14,17,18,20], [7,1,3,9,5]]
lenDiag = len(diag) ind = lenDiag sumDiag = 0
for n=1 to lenDiag
for m=1 to lenDiag-ind sumDiag += diag[n][m] next ind--
next
see "" + sumDiag + nl see "done..." + nl </lang>
- Output:
working... Sum of elements below main diagonal of matrix: 69 done...