Python Coding Challenge - Question with Answer (ID -310126)

 

Explanation:

🔹 Import NumPy Library

import numpy as np

This line imports the NumPy library and assigns it the alias np for easy use.

🔹 Create Matrix

mat = np.array([[1, 2], [3, 4]])

This line creates a 2×2 NumPy matrix with the given elements.

🔹 Initialize Sum Variable

s = 0

This line initializes the variable s to store the sum of diagonal elements.

🔹 Loop Through Diagonal Elements

for i in range(len(mat)):

This loop runs through the indices of the matrix rows.

🔹 Add Diagonal Elements

s += mat[i][i]

This line accesses and adds each diagonal element of the matrix to s.

🔹 Display Result

print(s)

This line prints the final sum of the diagonal elements.

✅ Output

5