Question

Accumulation Pattern

Problem 2
Consider the code below.

1 2 3 4 5 6 7 8 9 10 11 12 13 14

labs = ['lab1', 'lab2', 'lab3', 'lab4', 'lab5', 'lab6', 'lab7', 'lab8', 'lab9'] graded = '' for lab in labs:     lab_num = int(lab[3])     if lab_num < 4:         graded = graded + lab + ' is simple\n'     elif lab_num < 7:         graded = graded + lab + ' is ok\n'     else:         graded = graded + lab + ' is complex\n'          print(labs) print(graded)

Type it it the Active Code Scratchpad. Run it to check the outputs of the print() calls on lines 11, 12.

Part A. Analyze the application of the accumulation pattern and answer the following questions.

#1. A) What is the accumulator variable? ________________b. What's its data type? ________________

#2.c) What's the purpose of it?

#3.a) What's the iterator or loop variable? _____________ 2.b) What's its data type? ________________

#4. c ) What's the purpose of it?

#5 How many iterations does the for loop have? _________

#6 Write the line(s) of code where the accumulator "accumulates" something into it ________________

#7 What gets accumulated into the accumulator? Explain in English.

Part B Modify the value of labs variable such that it has the 10th element, 'lab10'. Run the program again.

#1 What do you get? Copy and paste the output from Scratchpad in here.

#2 Explain the result.

Answer 1

#1. A) What is the accumulator variable?
graded

b. What's its data type?
String

#2.c) What's the purpose of it?
It is a variable that adds something to itself

#3.a) What's the iterator or loop variable?
labs
2.b) What's its data type?
String array

#4. c ) What's the purpose of it?
For looping, controls how many times a loop runs

#5 How many iterations does the for loop have?
9

#6 Write the line(s) of code where the accumulator "accumulates" something into it
graded = graded + lab + ' is simple\n'
graded = graded + lab + ' is ok\n'
graded = graded + lab + ' is complex\n'

#7 What gets accumulated into the accumulator? Explain in English.
Whether the lab is simple / ok / complex

OUTPUT

('lab1', 'lab2', 'lab3', 'lab4', 'lab5', 'lab6', 'lab7', 'lab8', 'lab9'] labi is simple lab2 is simple lab3 is simple lab4 is ok lab5 is ok lab6 is ok lab7 is complex lab8 is complex lab9 is complex

#1 What do you get? Copy and paste the output from Scratchpad in here.

OUTPUT

['lab1', 'lab2', 'lab3', 'lab4', 'lab5', 'labb', 'lab7', 'lab8', 'lab9', 'lab10'] labi is simple lab2 is simple lab3 is simple lab4 is ok lab5 is ok labb is ok lab7 is complex lab8 is complex lab9 is complex lab10 is simple

#2 Explain the result.

Takes lab[3] which is 1 for lab10 and prints that it is simple.

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