Hungarian notation for variables
Name:
Date:
Class:
A
Quick Questions
Shade in the A or B circle for each question.
1. Which variable name uses Hungarian notation for a whole number holding a student's age?
2. What data type does the variable strSurname most likely hold?
3. Which name is the better choice for a decimal price such as 4.95?
4. A variable holds True or False to show whether a student passed. Which name follows Hungarian notation?
5. Which name correctly combines a Hungarian prefix with camel casing?
B
Match the Pairs
Draw a line connecting each item on the left to its match on the right.
| Left column | Right column | |
|---|---|---|
| 1strName | AThe int prefix says integer, but the value is a string. The prefix should be str, giving strName. | |
| 2blnPassed | BintStudentAge | |
| 3A whole-number variable named with a Hungarian notation prefix, then camel casing for the rest of the name | CThe prefix starts with a capital letter. Hungarian notation prefixes must be lower case, so it should be strName. | |
| 4A decimal-number variable named with a Hungarian notation prefix and a descriptive word | DA variable holding a Boolean (True or False) value, shown by the bln prefix | |
| 5StrName = "Ava" | EA variable holding a string (text), shown by the str prefix | |
| 6intName = "Liam" | FfltPrice |
C
Definitions
Hungarian notation
D
Fill in the Blanks
Complete each line of code by filling in the missing parts.
1.
___Name = "Ava"
2.
___Age = 16
3.
___Price = 4.50
4.
___Passed = True
5.
marks = 72
___HasPassed = marks >= 50
E
Spot the Error
Shade in the letter of the line that contains an error.
Question 1
A
strName = input("Name: ")
B
intAge = int(input("Age: "))
C
intPrice = 12.50
D
blnPassed = True
Question 2
A
strCity = "Geelong"
B
strPopulation = 270000
C
print(strCity, intPopulation)
Question 3
A
strScore = 72
B
blnPassed = intScore >= 50
C
print(blnPassed)
Question 4
A
strFirstName = "Mia"
B
strLastName = "Chen"
C
intYear = 11
D
average = 78.5
E
print(strFirstName, fltAverage)
Question 5
A
fltPrice = 4.50
B
blnQty = 3
C
fltTotal = fltPrice * intQty
D
print(fltTotal)
Answer Key
Hungarian notation for variables
Section A: Quick Questions
Q1
A — intAge
Q2
A — A string (text)
Q3
B — fltPrice
Q4
B — blnPassed
Q5
A — strFirstName
Section B: Match the Pairs
Q1
strName → A variable holding a string (text), shown by the str prefix
Q2
blnPassed → A variable holding a Boolean (True or False) value, shown by the bln prefix
Q3
A whole-number variable named with a Hungarian notation prefix, then camel casing for the rest of the name → intStudentAge
Q4
A decimal-number variable named with a Hungarian notation prefix and a descriptive word → fltPrice
Q5
StrName = "Ava" → The prefix starts with a capital letter. Hungarian notation prefixes must be lower case, so it should be strName.
Q6
intName = "Liam" → The int prefix says integer, but the value is a string. The prefix should be str, giving strName.
Section C: Definitions
Q1
Hungarian notation — A naming style where a variable name starts with a short lower-case prefix showing its data type, e.g. strName, intAge, fltPrice, blnPassed.Section D: Fill in the Blanks
Q1
strName = "Ava"Q2
intAge = 16Q3
fltPrice = 4.50Q4
blnPassed = TrueQ5
marks = 72
blnHasPassed = marks >= 50Section E: Spot the Error
Q1
C — The value 12.50 is a floating point number, so the prefix should be flt, not int. The line should be fltPrice = 12.50.
Q2
B — 270000 is a whole number, so the prefix should be int, not str. The line should be intPopulation = 270000.
Q3
A — 72 is an integer, so the prefix should be int. The str prefix wrongly suggests text. The line should be intScore = 72.
Q4
D — Hungarian notation needs a data type prefix at the start of the name. This float variable is missing its flt prefix. It should be fltAverage = 78.5.
Q5
B — The bln prefix is for Boolean values (True or False). The quantity 3 is an integer, so the name should be intQty.