Chapter 7.8, Problem 20CP

Program Plan Intro

Two-dimensional list:

• • A list that has another list as its elements is called as two-dimensional list.
• • Two-dimensional list is a type of nested list, where elements are arranged in row and column order.
• • The element in the list is retrieved using two subscripts. One subscript specifies the row and other subscript specifies the column.
• • The two-dimensional lists are helpful in processing various sets of information.

Syntax:

In Python, two-dimensional lists have the below format:

List_name = [list1, list2, …, listn]

Explanation:

Here,

• • The variable “List_name” is a two-dimensional list.
• • The variables “list1”, “list2”, and “listn” are elements of two-dimensional list “List_name” that indicates one-dimensional lists.

Example:

Consider the following example that shows a two-dimensional list.

student_scores = [[45, 63, 72], [81, 58, 97], [100, 23, 67]]

Explanation:

In the given above code,

• • The variable “student_scores” is a two-dimensional list that stores the students’ scores at various exams.