please tell me each the line means? and what it does in details and answer questions please, thank you **Title: Understanding Nested Loops in Python****Introduction:**This educational section explores how nested lists work in Python and demonstrates how different loops interact with these structures. We will look at two code snippets (2A and 2B) to understand their output when executed.**Code Snippet 2A:**```pythonnested = [[3, 4, 5], [8, 9, 10]]for i in range(len(nested)): print(nested[i])```**Explanation 2A:**- The variable `nested` is a list containing two inner lists: `[3, 4, 5]` and `[8, 9, 10]`.- The `for` loop iterates over each inner list within the `nested` list.- For each iteration, `print(nested[i])` outputs the entire i-th inner list.**Output 2A:**```[3, 4, 5][8, 9, 10]```**Code Snippet 2B:**```pythonnested = [[3, 4, 5], [8, 9, 10]]for i in range(len(nested)): for j in range(len(nested[i])): print(nested[i][j])```**Explanation 2B:**- Similar to 2A, `nested` is a list containing two lists.- The outer loop iterates over each inner list.- The inner loop iterates over each element in the current inner list.- `print(nested[i][j])` outputs each element of the inner lists individually.**Output 2B:**```3458910```**Conclusion:**By comparing these code snippets, you can see how accessing and printing elements differs between iterating over lists and nested lists. This demonstrates crucial concepts in handling complex data structures like nested lists in Python.

A nested list is a list within a list i.e. the list element is also list. In the given problem, a…

What do each of the following code snippets print to the terminal? 2A 1 nested = [[3, 4, 5], [8, 9, 10]] 2 for i in range(len(nested)): 3 print(nested[i) 2B 1 nested = [[3, 4, 5], [8, 9, 10]] 2 for i in range(len(nested)): 3 for j in range(len(nested[i): print(nested[i][j])

What do each of the following code snippets print to the terminal? 2A 1 nested = [[3, 4, 5], [8, 9, 10]] 2 for i in range(len(nested)): 3 print(nested[i) 2B 1 nested = [[3, 4, 5], [8, 9, 10]] 2 for i in range(len(nested)): 3 for j in range(len(nested[i): print(nested[i][j])

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Global-Travel, an on-line reservation system Global-Travel is an airline that sells all its tickets through an on-line system on the Internet. Prospective travellers register their details by filling in the form available on the company's web site. Once a registration has been confirmed as valid, the travellers can proceed by selecting the destination to which they wish to travel, the date of travel, and the type of ticket they wish to purchase. Only those of destinations to which Global-Travel flies appear on the list of destinations for customers to choose from. Once a destination has been selected, the date box displays only those days of the week on which Global-Travel flies to the selected destination.Once all ticket details are entered, the customer submits the details to the systems by clicking on the appropriate button. The system responds by either accepting the reservation or rejecting it. If a reservation is rejected, the system displays the reason (e.g., no available places…