Assignment 13 — Nesting

Due Tuesday, September 27

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Program digit_box.py

• Get an integer n from the user.

• Print an n-by-n grid of one-digit numbers, whose rows are numbered 0 to n-1 and columns are numbered 0 to n-1.

• The digit in the r ^th row, c ^th column is to be the last digit of the product r × c.

Two possible program runs

Enter integer: 4

0 0 0 0

0 1 2 3

0 2 4 6

0 3 6 9

Enter integer: 9

0 0 0 0 0 0 0 0 0

0 1 2 3 4 5 6 7 8

0 2 4 6 8 0 2 4 6

0 3 6 9 2 5 8 1 4

0 4 8 2 6 0 4 8 2

0 5 0 5 0 5 0 5 0

0 6 2 8 4 0 6 2 8

0 7 4 1 8 5 2 9 6

0 8 6 4 2 0 8 6 4

Observations

• The last digit of a base 10 number equals the remainder of that number when divided by 10. The % is a Python operator for that.

• Since the number of rows n is user-provided, a loop is necessary to process each row of the digit table.

• Since the number of columns per row also comes from n, a loop is necessary to process each row.

• Because the column processing happens for every row, the loop to process the rows will contain a loop to process the columns for a row; i.e., nested looping.

 

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