Pseudocode assignment: ←
Name:
Date:
Class:
A
Quick Questions
Shade in the A or B circle for each question.
1. Which line correctly sets the variable Total to 0 in Cambridge pseudocode?
2. In Total ← 0, which side of the ← symbol holds the variable that receives the value?
3. What does Total ← Total + Score do?
4. Total is 10 and Score is 5. What is Total after Total ← Total + Score?
5. Which of these is an assignment that stores the value 7 in Score?
B
Match the Pairs
Draw a line connecting each item on the left to its match on the right.
| Left column | Right column | |
|---|---|---|
| 1Total ← 0 | AStores the value 0 in the variable Total, so Total starts at zero | |
| 2Total ← Total + Score | BCount ← 10 | |
| 3The variable that receives the value goes on the left of the ← symbol | CThe calculation is on the left. The variable must be on the left and the calculation on the right, so it should be Total ← Total + Score. | |
| 4To keep a running total, assign the old total plus the new value back to the total | DTotal ← Total + Score | |
| 50 ← Total | EThe value and variable are the wrong way round. The variable must be on the left and the value on the right, so it should be Total ← 0. | |
| 6Total + Score ← Total | FWorks out the current Total plus Score, then stores the answer back in Total |
C
Definitions
Total ← 0
D
Fill in the Blanks
Complete each line of code by filling in the missing parts.
1.
Total _ 0
2.
Total ← 0
Score ← 8
_____ ← Total + Score
3.
Total ← 0
Score ← 8
Total ← Total _ Score
4.
Total ← _
OUTPUT Total
5.
Score ← 8
Total ← _____ + Score
E
Spot the Error
Shade in the letter of the line that contains an error.
Question 1
A
INPUT Score
B
0 ← Total
C
Total ← Total + Score
D
OUTPUT Total
Question 2
A
Total ← 0
B
Total + 5 ← Total
C
OUTPUT Total
Question 3
A
Total ← 0
B
INPUT Score
C
Total ← Score
D
OUTPUT Total
Question 4
A
Count ← 0
B
INPUT Mark
C
IF Mark >= 50 THEN
D
Count ← Count - 1
E
ENDIF
Question 5
A
INPUT Price
B
INPUT Qty
C
Cost Price * Qty
D
OUTPUT Cost
Answer Key
Pseudocode assignment: ←
Section A: Quick Questions
Q1
B — Total ← 0
Q2
A — The left side
Q3
A — Adds Score to the current value of Total and stores the result in Total
Q4
A — 15
Q5
B — Score ← 7
Section B: Match the Pairs
Q1
Total ← 0 → Stores the value 0 in the variable Total, so Total starts at zero
Q2
Total ← Total + Score → Works out the current Total plus Score, then stores the answer back in Total
Q3
The variable that receives the value goes on the left of the ← symbol → Count ← 10
Q4
To keep a running total, assign the old total plus the new value back to the total → Total ← Total + Score
Q5
0 ← Total → The value and variable are the wrong way round. The variable must be on the left and the value on the right, so it should be Total ← 0.
Q6
Total + Score ← Total → The calculation is on the left. The variable must be on the left and the calculation on the right, so it should be Total ← Total + Score.
Section C: Definitions
Q1
Total ← 0 — The ← symbol is assignment: it stores the value on its right in the variable on its left. Total ← 0 sets Total to 0. Total ← Total + Score adds Score to Total.Section D: Fill in the Blanks
Q1
Total ← 0Q2
Total ← 0
Score ← 8
Total ← Total + ScoreQ3
Total ← 0
Score ← 8
Total ← Total + ScoreQ4
Total ← 0
OUTPUT TotalQ5
Score ← 8
Total ← Total + ScoreSection E: Spot the Error
Q1
B — The variable must be on the left of ← and the value on the right. 0 is not a variable, so it cannot store anything. It should be Total ← 0.
Q2
B — The left side of ← must be a single variable. Total + 5 is a calculation, so it goes on the right. It should be Total ← Total + 5.
Q3
C — This replaces Total with Score instead of adding Score to the running total. It should be Total ← Total + Score.
Q4
D — Counting passes needs Count to go up by 1, but this subtracts 1. The line should be Count ← Count + 1.
Q5
C — The assignment arrow is missing, so nothing is stored in Cost. It should be Cost ← Price * Qty.