Writing literals in pseudocode
Name:
Date:
Class:
A
Quick Questions
Shade in the A or B circle for each question.
1. Which is the correct way to write the single character Y as a CHAR literal in pseudocode?
2. Which is the correct way to write the word Yes as a STRING literal?
3. Which is a correct empty STRING literal?
4. Which is the correct way to write the REAL number four?
5. Which is a correct REAL literal for half?
B
Match the Pairs
Draw a line connecting each item on the left to its match on the right.
| Left column | Right column | |
|---|---|---|
| 1'Y' | AIsValid ← TRUE | |
| 2"" | BAn empty STRING literal: double quotes with nothing between them | |
| 3A REAL literal needs a digit on both sides of the decimal point | CPrice ← 4.0 | |
| 4A BOOLEAN literal is TRUE or FALSE, written in capitals | DA CHAR literal must use single quotes, not double quotes. Double quotes make it a STRING. It should be 'A'. | |
| 5Grade ← "A" (Grade is a CHAR) | EA REAL literal needs a digit after the decimal point. 4. should be written as 4.0. | |
| 6Total ← 4. | FA CHAR literal: one character inside single quotes |
C
Definitions
'Y' "Yes" 4.0 TRUE
D
Fill in the Blanks
Complete each line of code by filling in the missing parts.
1.
DECLARE Grade : ____
// Store the letter A
Grade ← 'A'
2.
DECLARE Name : ______
// Start with no text at all
Name ← ""
3.
DECLARE Price : REAL
// The price is exactly four
Price ← ___
4.
DECLARE Found : BOOLEAN
// Nothing has been found yet
Found ← _____
5.
DECLARE Temp : INTEGER
// Three degrees below zero
Temp ← __
E
Spot the Error
Shade in the letter of the line that contains an error.
Question 1
A
Name ← 'Sam'
B
Age ← 15
C
OUTPUT Name, Age
Question 2
A
DECLARE Total : REAL
B
Qty ← 3
C
Total ← Qty * 4.
D
OUTPUT Total
Question 3
A
DECLARE Found : BOOLEAN
B
DECLARE Count : INTEGER
C
Count ← 0
D
Found ← false
E
OUTPUT Found
Question 4
A
DECLARE Initial : CHAR
B
DECLARE Name : STRING
C
Name ← "Maya"
D
Initial ← "M"
Question 5
A
Temp ← .5
B
OUTPUT Temp
C
Temp ← Temp + 1.0
Answer Key
Writing literals in pseudocode
Section A: Quick Questions
Q1
A — 'Y'
Q2
B — "Yes"
Q3
B — ""
Q4
A — 4.0
Q5
A — 0.5
Section B: Match the Pairs
Q1
'Y' → A CHAR literal: one character inside single quotes
Q2
"" → An empty STRING literal: double quotes with nothing between them
Q3
A REAL literal needs a digit on both sides of the decimal point → Price ← 4.0
Q4
A BOOLEAN literal is TRUE or FALSE, written in capitals → IsValid ← TRUE
Q5
Grade ← "A" (Grade is a CHAR) → A CHAR literal must use single quotes, not double quotes. Double quotes make it a STRING. It should be 'A'.
Q6
Total ← 4. → A REAL literal needs a digit after the decimal point. 4. should be written as 4.0.
Section C: Definitions
Q1
'Y' "Yes" 4.0 TRUE — Literals have fixed forms: CHAR in single quotes, STRING in double quotes, REAL with a digit each side of the point, BOOLEAN as TRUE or FALSE in capitals.Section D: Fill in the Blanks
Q1
DECLARE Grade : CHAR
// Store the letter A
Grade ← 'A'Q2
DECLARE Name : STRING
// Start with no text at all
Name ← ""Q3
DECLARE Price : REAL
// The price is exactly four
Price ← 4.0Q4
DECLARE Found : BOOLEAN
// Nothing has been found yet
Found ← FALSEQ5
DECLARE Temp : INTEGER
// Three degrees below zero
Temp ← -3Section E: Spot the Error
Q1
A — A STRING literal must be in double quotes. Single quotes are only for one CHAR. It should be Name ← "Sam".
Q2
C — A REAL literal needs a digit on both sides of the decimal point. 4. is wrong and should be 4.0.
Q3
D — BOOLEAN values are written in capitals as TRUE or FALSE. It should be Found ← FALSE.
Q4
D — Initial is a CHAR, so its literal goes in single quotes. Double quotes make it a STRING. It should be Initial ← 'M'.
Q5
A — A REAL literal needs a digit before the decimal point as well as after it. It should be Temp ← 0.5.