STRING data type
Name:
Date:
Class:
A
Quick Questions
Shade in the A or B circle for each question.
1. Which is a valid STRING literal in Cambridge pseudocode?
2. Which line correctly declares a variable to store a person's name?
3. What is "" in pseudocode?
4. What is the data type of "123"?
5. What is the data type of "A"?
B
Match the Pairs
Draw a line connecting each item on the left to its match on the right.
| Left column | Right column | |
|---|---|---|
| 1DECLARE Name : STRING | ACode ← "123" | |
| 2Text ← "" | BCreates a variable that can store text made of zero or more characters | |
| 3A STRING literal is written between double quotes | CGreeting ← "Hello, Sam" | |
| 4Digits inside double quotes are text, not a number, so they are a STRING | DStores the empty string, which has zero characters, in Text | |
| 5Name ← Sam | E"1234" is a STRING because of the double quotes, so it cannot be assigned to an INTEGER variable. Declare Pin as STRING or assign 1234. | |
| 6DECLARE Pin : INTEGER Pin ← "1234" | FThe text has no double quotes, so it is not a STRING literal. It should be Name ← "Sam". |
C
Definitions
STRING
D
Fill in the Blanks
Complete each line of code by filling in the missing parts.
1.
DECLARE UserName : ______
2.
DECLARE Message : STRING
_______ ← ""
3.
DECLARE PhoneNumber : ______
PhoneNumber ← "0123456789"
4.
_______ Word : STRING
Word ← "A"
5.
DECLARE Reply : STRING
Reply _ "123"
E
Spot the Error
Shade in the letter of the line that contains an error.
Question 1
A
DECLARE Name : STRING
B
Name ← "Ava"
C
OUTPUT "Hi , Name
Question 2
A
DECLARE Pet : TEXT
B
Pet ← "Cat"
C
OUTPUT Pet
Question 3
A
DECLARE Pin : STRING
B
Pin ← "1234"
C
DECLARE Next : STRING
D
Next ← 5678
Question 4
A
DECLARE Name : STRING
B
INPUT Name
C
IF Name = "" THEN
D
Name ← Guest
E
ENDIF
Question 5
A
DECLARE Age : INTEGER
B
Age ← "15"
C
OUTPUT Age + 1
Answer Key
STRING data type
Section A: Quick Questions
Q1
B — "Hello World"
Q2
A — DECLARE Name : STRING
Q3
A — The empty string, a STRING with zero characters
Q4
A — STRING, because it is in double quotes
Q5
B — STRING, because it uses double quotes
Section B: Match the Pairs
Q1
DECLARE Name : STRING → Creates a variable that can store text made of zero or more characters
Q2
Text ← "" → Stores the empty string, which has zero characters, in Text
Q3
A STRING literal is written between double quotes → Greeting ← "Hello, Sam"
Q4
Digits inside double quotes are text, not a number, so they are a STRING → Code ← "123"
Q5
Name ← Sam → The text has no double quotes, so it is not a STRING literal. It should be Name ← "Sam".
Q6
DECLARE Pin : INTEGER
Pin ← "1234" → "1234" is a STRING because of the double quotes, so it cannot be assigned to an INTEGER variable. Declare Pin as STRING or assign 1234.
Section C: Definitions
Q1
STRING — The data type for text: zero or more characters written between double quotes, such as "This is a string". "" is the empty string and "123" is text, not a number.Section D: Fill in the Blanks
Q1
DECLARE UserName : STRINGQ2
DECLARE Message : STRING
Message ← ""Q3
DECLARE PhoneNumber : STRING
PhoneNumber ← "0123456789"Q4
DECLARE Word : STRING
Word ← "A"Q5
DECLARE Reply : STRING
Reply ← "123"Section E: Spot the Error
Q1
C — A STRING literal must start and end with double quotes. The closing quote is missing after Hi. It should be OUTPUT "Hi ", Name.
Q2
A — TEXT is not a Cambridge pseudocode data type. The data type for text is STRING, so the line should be DECLARE Pet : STRING.
Q3
D — Next is a STRING variable, so it must be given text in double quotes. 5678 without quotes is an INTEGER. It should be Next ← "5678".
Q4
D — Text must be written in double quotes. Without them, Guest looks like an identifier, not a STRING value. It should be Name ← "Guest".
Q5
B — "15" in double quotes is a STRING, which is text and not a number. Age is an INTEGER, so it needs the number 15 with no quotes: Age ← 15.