Matrix Calculation Problem

[baquerik]

Why j in range(0) is not excuted because it value present in array A. i.e A[1][0]. why the code doesnot pick this value?

range(0) returns a 0. That means that it will NOT iterate (or it will iterate 0 amount of times) and it goes directly to the next iteration on the upper loop where i=2.


This check outputs what you were asking for:

for i in range(n):
    if i <= 1:
        value=1
    else:
        value=i-1
    for j in range(value):
        B[i] += sum + A[i][j]

Output:
[0. 1. 2. 5. 9.]