Title of Lab: Multiplication Table in Python
Summary
This week’s lab is to create a simple multiplication table using nested loops and if statements.
Prompt the user for the size of the multiplication table (from 2×2 to 10×10). Use a validation loop to display a warning if the number is less than 2 or greater than 10 and prompt the user to enter the data again until they enter a valid number.
Put a # after any even number in your table (odd numbers will have just a space/nothing after them).
Deliverables
A source code Python file.
A Word document containing both source code and the screen print of the program outputs.
Lab Steps
Sample Output:
The output should be something similar to the following.
What size multiplication table would you like? (2 – 10): 1
Invalid entry – Enter a number between 2 and 10
What size multiplication table would you like? (2 – 10): 15
Invalid entry – Enter a number between 2 and 10
What size multiplication table would you like? (2 – 10): 10
— Multiplication Table ( 10 x 10 ) —
1 2 3 4 5 6 7 8 9 10
—————————————————————————
1 | 1 2 # 3 4 # 5 6 # 7 8 # 9 10 #
2 | 2 # 4 # 6 # 8 # 10 # 12 # 14 # 16 # 18 # 20 #
3 | 3 6 # 9 12 # 15 18 # 21 24 # 27 30 #
4 | 4 # 8 # 12 # 16 # 20 # 24 # 28 # 32 # 36 # 40 #
5 | 5 10 # 15 20 # 25 30 # 35 40 # 45 50 #
6 | 6 # 12 # 18 # 24 # 30 # 36 # 42 # 48 # 54 # 60 #
7 | 7 14 # 21 28 # 35 42 # 49 56 # 63 70 #
8 | 8 # 16 # 24 # 32 # 40 # 48 # 56 # 64 # 72 # 80 #
9 | 9 18 # 27 36 # 45 54 # 63 72 # 81 90 #
10 | 10 # 20 # 30 # 40 # 50 # 60 # 70 # 80 # 90 # 100 #
Hints:
The outer loop will start each new row.
The inner loop will control the display of each column in the row.
Note that to keep the numbers right-aligned, there are different amounts of space before single digit numbers (those less than 10), double digit numbers (those between 10-99), and triple digit numbers (100).
The row labels can be added to your inner loop (note that there are different amounts of space required after the number in the row labels.
The column labels should use a separate loop(s) that run before the main outer loop.
You can continue printing on the same line using end=”” in your print statement. This will come in handy if you want to print several things on one line inside a loop. For example, assuming the value of name is Ada, the following will print “Hello Ada” on one line:
print(“hello “, end=””)
print(name, end=””)
Tips:
Start early!
Do the basic table first without worrying about spacing or lining things up, and don’t include row or column headings (add those later).
Once you get the numbers in the correct position, think about adding the proper amount of space before each number to line things up.
Once the columns line up, add the #/space for even/odd numbers.
Once the basic table is working, then add the row and column headings, and finally the main title.
Test as you go!