Lesson 3.8 · Trace it

Trace: digit sum

Python code12 rows to fill3 marks

Complete the trace table for this Python code. In Python, // divides and keeps only the whole number part, and % gives the remainder. [3]

Line 1: n = 4721n = 472
Line 2: total = 02total = 0
Line 3: while n > 0:3while n > 0:
Line 4, indented 1 level: digit = n % 104    digit = n % 10
Line 5, indented 1 level: total = total + digit5    total = total + digit
Line 6, indented 1 level: n = n // 106    n = n // 10
Line 7: print(total)7print(total)

Fill in one row each time a line changes n, digit or total, or prints something. The table already has the right number of rows. In each row, write only what that line changes; you can leave the other cells empty or copy their values down. Write values the way Python shows them: 3 and 3.0 are different, and text goes in quotes. In the output column, write exactly what appears on screen, with no quotes around it.

Row	n	digit	total	output
1
2
3
4
5
6
7
8
9
10
11
12