Assignment 1

1. Demo problem. Suppose we want to use for-loops to produce this arrow-head like pattern:

   *
   **
   ***
   ****
   *****
   ******
   *******
   ********
   *********
   **********
   **********
   *********
   ********
   *******
   ******
   *****
   ****
   ***
   **
   *
       

   At this point, do not read further and try to address the following:
   • First understand what is being asked.
   • Do you see a for-loop or two at work where, as the loops are printing, you'll get the output shown above?
   • Can the problem be broken down into parts, where you can solve the parts and put the solution together afterwards?
   • Try writing some code to get at least some of the output.

   Now examine the solution

   Don't forget to submit your solutions to the exercises within.

2. In my_nested.py use nested loops in print the following pattern:

   1  1
   2  1
   3  1
   4  1
   1  2
   2  2
   3  2
   4  2
   1  3
   2  3
   3  3
   4  3
   1  4
   2  4
   3  4
   4  4
       

3. In my_nested2.py, write a program that uses nested for-loops to print the following pattern:

   * * * * * * * * * * 10
     * * * * * * * * * 9
       * * * * * * * * 8
         * * * * * * * 7
           * * * * * * 6
             * * * * * 5
               * * * * 4
                 * * * 3
                   * * 2
                     * 1
       

   Notice the spaces between asterisks, the spaces leading up to the first asterisk in each line, and the number at the end. There's no space before the first asterisk on the first line.

4. In this exercise you will use a drawing tool and a for-loop to draw a series of rectangles. The goal is to draw this:

   

   The code for drawing a single rectangle is:

   from drawtool import DrawTool 
   
   dt = DrawTool()
   dt.set_XY_range(0,100, 0,100)
   
   dt.draw_filled_rectangle(10, 20, 5, 10)
   
   dt.display()
       

   This produces (we've added some markup to explain):

   

   As a first step, download drawtool.py into your assignment1 folder and type up the above single-rectangle example in my_rectangle_example.py. This way, you know that the download worked and that drawing works. Now you can focus on the many-rectangle problem. Think about how the for-loop needs to range so that you can draw the rectangles in the loop. Write your program in my_rectangle_pattern.py.

5. The following program intends to print

   hello
   how're
   you?
       

   This is the alleged program:

   print('hello")
   print('how're')
   print('you?)
       

   There are several errors above. Point them out in your assignment pdf. Then fix them in fixed_hello.py.

6. The following program intends to print the following five times as in:

   xyz
   xyz
   xyz
   xyz
   xyz
       

   This is the alleged program:

   Def print_one_line():
   for i in range(1,5):
       print(xyz)
   
   print_one_line
       

   There are several errors above. Point them out in your assignment pdf. Then fix them in fixed_xyz.py.

7. The following program intends to print the numbers 5 through 0 as in:

   5
   4
   3
   2
   1
   0
       

   This is the alleged program:

   def function#2()
       for i in range(5,-1, 0):
           print(i)
   
   function#2()
       

   There are several errors above. Point them out in your assignment pdf. Then fix them in fixed_downprint.py.

8. In each assignment, we will include a sometimes whimsical, sometimes serious non-coding exploration to encourage creativity and curiousity. For this assignment, in your assignment1.pdf, make a cartoon that makes light of "frustration with computers". You can use a simple drawing tool, or find images that are copyright-free (please include the link to images/cartoons). Make sure the caption is original (this is the whole point). We'll post some of the funniest ones.

A1.6 Audio:

How to submit:

• Write all your programs and assignment1.pdf in a directory called assignment1.
• Make a zip of the directory and submit that.