Question

use python and one loop to solve this problem

Q6: Secondary Trace You are given a function that takes a square array, matrix, and returns the sum of the secondary diagonal values for matrix. This function employs a nested 2D for-loop. Write a function secondary trace single loop that solves the same problem using only one for-loop. For example, on the picture below secondary diagonal consists of values: a03, a12, a21, a30. a00 a01 a02 a03 a10 all a12 a13 a20 a21 a22 a23 a30 a31 a32 a33

Answer 1

def secondary_trace_single_loop(matrix):
diag_sum=0
size = len(matrix[0])#find the lenth of the column
for i in range(size):#loop untill the column ends
diag_sum += matrix[i][size-i-1]#sum the secong diagonal elemnt
return diag_sum#return the sum of diagonal

m0=[[1,0],[0,1]]
m1=[[1,1,1],[2,2,2],[3,3,3]]
m2=[[3,4],[6,9]]
print(secondary_trace_single_loop(m0))#call the function with matrix and print the results
print(secondary_trace_single_loop(m1))
print(secondary_trace_single_loop(m2))

output and code sneps

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