Assigned value must match the variable's data type

Name:

Date:

Class:

Quick Questions

Shade in the A or B circle for each question.

1. DECLARE Age : INTEGER Age ← "Ali"

A Valid: Age can hold any value you assign to it

B Type mismatch: a STRING cannot be stored in an INTEGER variable

2. Which assignment is correct for DECLARE Name : STRING?

A Name ← Ali

B Name ← "Ali"

3. Which assignment is correct for DECLARE Grade : CHAR?

A Grade ← 'A'

B Grade ← "A"

4. DECLARE Score : INTEGER Score ← 42 Is this assignment valid?

A Yes: 42 is a whole number, so it matches INTEGER

B No: numbers cannot be stored in variables

5. DECLARE Initial : CHAR Initial ← "Ali" What is the problem?

A A STRING of several characters is assigned to a CHAR variable

B The variable name Initial is not allowed

Match the Pairs

Draw a line connecting each item on the left to its match on the right.

Left column		Right column
1DECLARE Age : INTEGER Age ← "Ali"		AType mismatch: text is assigned to an INTEGER variable. Score should be given a whole number such as 45.
2DECLARE Grade : CHAR Grade ← 'B'		BA correct assignment: a single character in single quotes matches the CHAR type
3A STRING variable must be given text inside double quotes		CDECLARE Initial : CHAR Initial ← 'A'
4A CHAR variable must be given a single character inside single quotes		DDECLARE Name : STRING Name ← "Ali"
5DECLARE Score : INTEGER Score ← "Ali"		EA CHAR value needs single quotes, not double quotes. It should be Letter ← 'A'.
6DECLARE Letter : CHAR Letter ← "A"		FA type mismatch: the text "Ali" cannot be stored in an INTEGER variable

Definitions

type mismatch

Fill in the Blanks

Complete each line of code by filling in the missing parts.

DECLARE Age : _______ Age ← 15

DECLARE Name : ______ Name ← "Ali"

DECLARE Grade : ____ Grade ← 'A'

DECLARE Town : STRING Town _ "Leeds"

_______ Initial : CHAR Initial ← 'K'

Spot the Error

Shade in the letter of the line that contains an error.

Question 1

A DECLARE Age : INTEGER

B Age ← 15

C Age ← "Ali"

D OUTPUT Age

Question 2

A DECLARE Name : INTEGER

B Name ← "Ali"

C OUTPUT Name

Question 3

A DECLARE Grade : BOOLEAN

B Grade ← 'B'

C OUTPUT Grade

Question 4

A DECLARE City : STRING

B DECLARE Age : INTEGER

C City ← Leeds

D Age ← 14

Question 5

A DECLARE Initial : CHAR

B DECLARE Name : STRING

C Initial ← "A"

D Name ← "Ali"

Answer Key

Assigned value must match the variable's data type

Section A: Quick Questions

B — Type mismatch: a STRING cannot be stored in an INTEGER variable

B — Name ← "Ali"

A — Grade ← 'A'

A — Yes: 42 is a whole number, so it matches INTEGER

A — A STRING of several characters is assigned to a CHAR variable

Section B: Match the Pairs

DECLARE Age : INTEGER Age ← "Ali" → A type mismatch: the text "Ali" cannot be stored in an INTEGER variable

DECLARE Grade : CHAR Grade ← 'B' → A correct assignment: a single character in single quotes matches the CHAR type

A STRING variable must be given text inside double quotes → DECLARE Name : STRING Name ← "Ali"

A CHAR variable must be given a single character inside single quotes → DECLARE Initial : CHAR Initial ← 'A'

DECLARE Score : INTEGER Score ← "Ali" → Type mismatch: text is assigned to an INTEGER variable. Score should be given a whole number such as 45.

DECLARE Letter : CHAR Letter ← "A" → A CHAR value needs single quotes, not double quotes. It should be Letter ← 'A'.

Section C: Definitions

type mismatch — An error when a value assigned to a variable has a different data type from the one it was declared with, such as storing a name in an INTEGER variable.

Section D: Fill in the Blanks

DECLARE Age : INTEGER
Age ← 15

DECLARE Name : STRING
Name ← "Ali"

DECLARE Grade : CHAR
Grade ← 'A'

DECLARE Town : STRING
Town ← "Leeds"

DECLARE Initial : CHAR
Initial ← 'K'

Section E: Spot the Error

C — Age was declared as INTEGER, so it can only hold whole numbers. The text "Ali" is a STRING, which causes a type mismatch. It should be a whole number such as Age ← Age + 1.

A — Name is assigned the text "Ali", so it must be declared as STRING. An INTEGER variable cannot hold text. It should be DECLARE Name : STRING.

A — Grade stores the single character 'B', so it must be declared as CHAR. A BOOLEAN variable can only hold TRUE or FALSE. It should be DECLARE Grade : CHAR.

C — A STRING value needs double quotes. Without them, Leeds looks like a variable name, not text. It should be City ← "Leeds".

C — A CHAR value must be written in single quotes. Double quotes make it a STRING literal, which is a type mismatch. It should be Initial ← 'A'.