You have a list of lists: matrix = [[1,2], [3,4], [5,6]]. How do you find the total number of elements inside all inner lists combined?

hard🚀 Application Q8 of Q15

Python - Magic Methods and Operator Overloading

You have a list of lists: matrix = [[1,2], [3,4], [5,6]]. How do you find the total number of elements inside all inner lists combined?

Amatrix.length()

Bsum(len(row) for row in matrix)

Clen(matrix[0])

Dlen(matrix)

Step-by-Step Solution

Solution:

Step 1: Understand the structure of matrix
Matrix is a list containing 3 inner lists, each with 2 elements.
Step 2: Calculate total elements
Sum the lengths of each inner list: 2 + 2 + 2 = 6 using sum(len(row) for row in matrix).
Final Answer:
sum(len(row) for row in matrix) -> Option B
Quick Check:
Total elements in nested lists = sum of inner lengths [OK]

Quick Trick: Sum lengths of inner lists to get total elements [OK]

Common Mistakes:

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