Assume 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.

Answer: To read and display each line from the file "data.txt," follow the steps below: 1. Open the file using the open() function in read mode: ```python file = open('data.txt', 'r') ``` 2. Initialize a variable 'line' to None, and set up a while loop that reads each line and prints it until the readline() method returns an empty string: ```python line = None while line != '': line = file.readline() print(line) ``` 3. Close the file to free up any associated resources using the close() method: ```python file.close() ``` Combining these steps, the full program would look like this: ```python file = open('data.txt', 'r') line = None while line != '': line = file.readline() print(line) file.close() ```