Assume that the file data.txt exists and contains several lines of text. Write a short program using the while loop that displays each line in the file.

Question: Write a Python program that reads and displays the contents of a text file called data.txt using a while loop, and explain the steps involved in the process. Answer: To read and display the contents of "data.txt" using a while loop, follow these steps: 1. Open the file using the open() function, with "data.txt" as the file name and "r" as the mode, indicating reading. Store the opened file in a variable, like 'file'. ```python file = open("data.txt", "r") ``` 2. Initialize a loop control variable by reading the first line of the file using the readline() method, and store it in a variable like 'line'. ```python line = file.readline() ``` 3. Create a while loop that continues executing until the end of the file. As long as 'line' is not empty, print its content and read the next line using readline(). ```python while line: print(line.strip()) line = file.readline() ``` 4. After the loop finishes, close the file using the close() method to release system resources. ```python file.close() ``` The complete program reads and displays each line from the data.txt file using a while loop: ```python file = open("data.txt", "r") line = file.readline() while line: print(line.strip()) line = file.readline() file.close() ```