Nested Lists and Iteration
Work with nested lists and iterate efficiently with for loops.
Introduction
Lists can contain other lists, creating multi-dimensional structures. Mastering nested iteration is key for grids and matrices.
Nested List Structure
matrix = [[1,2,3],[4,5,6],[7,8,9]] is a 3x3 grid. matrix[1][2] accesses row 1, column 2 — which is 6.
matrix = [[1,2,3],[4,5,6],[7,8,9]]
print(matrix[1][2])All lessons in this course
- Creating and Accessing Lists
- Modifying Lists
- Tuples and Immutability
- Nested Lists and Iteration