Pass Task 1.2P: nested loop

Task description:

Get an integer from user, draw a square of "*" based on the value of the input. If the input is not a positive integer, prompt error and require a new input.

(Sample output as shown in the following figure is for demonstration purposes only.)

Submission:

Submit the following files to OnTrack:

1. Your program source code (e.g. task1-2.py)

2. A screen shot of your program running

Check the following things before submitting:

1. Add proper comments to your code