Practice Questions — Variables and Data Types in Python
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Question 1
Easy
Create a variable called city and assign the value "Mumbai" to it. Then print the value of the variable.
Use the assignment operator (=) and print().
city = "Mumbai"
print(city)Question 2
Easy
What are the four basic data types in Python?
Think about whole numbers, decimal numbers, text, and yes/no values.
The four basic data types are: int (integers/whole numbers), float (floating-point/decimal numbers), str (strings/text), and bool (booleans: True or False).
Question 3
Easy
What is the output of: print(type(3.14))
3.14 has a decimal point.
Output:
<class 'float'>Question 4
Easy
Which of these variable names are valid in Python? (a) my_name (b) 2fast (c) _count (d) for (e) student name
Check each one: can it start with a digit? Does it contain spaces? Is it a keyword?
Valid: (a) my_name and (c) _count. Invalid: (b) 2fast (starts with digit), (d) for (Python keyword), (e) student name (contains a space).
Question 5
Easy
What is the output of:
x = 5
print(type(x))
x = "five"
print(type(x))
Python is dynamically typed — variables can change type.
Output:
Question 6
Medium
What is the output of:
print(int(7.9))
print(int(7.1))
print(int(-3.8))
int() truncates — it removes the decimal part. It does NOT round.
Output:
7
7
-3Question 7
Medium
What is the output of:
print(bool(""))
print(bool(" "))
print(bool("0"))
print(bool(0))
For strings, bool() checks if the string is empty. For numbers, it checks if the number is zero.
Output:
False
True
True
FalseQuestion 8
Medium
What is the output of:
a, b, c = 10, 20, 30
print(b)
In multiple assignment, values are matched left to right.
Output:
20Question 9
Medium
What is the output of:
x = 10
y = 20
x, y = y, x
print(x, y)
This is variable swapping. The right side is evaluated completely before assignment.
Output:
20 10Question 10
Medium
What is the output of:
result = 10 / 2
print(result)
print(type(result))
Division with / always returns a float, even when the result is a whole number.
Output:
5.0
Question 11
Medium
What is the output of:
print(True + True + True)
print(True * 5)
print(False + 42)
In arithmetic, True is treated as 1 and False as 0.
Output:
3
5
42Question 12
Medium
Explain the difference between x = 5 (assignment) and x == 5 (comparison).
One stores a value, the other checks a condition.
x = 5 is assignment — it stores the value 5 in the variable x. x == 5 is comparison — it checks whether the current value of x is equal to 5 and returns True or False.Question 13
Hard
What is the output of:
print("5" + "3")
print(5 + 3)
print("5" * 3)
print(int("5") + int("3"))
The + operator behaves differently for strings and numbers.
Output:
53
8
555
8Question 14
Hard
What is the output of:
x = 5
print(type(x))
x = 5.0
print(type(x))
x = "5"
print(type(x))
x = True
print(type(x))
5 is int, 5.0 is float, "5" is str, True is bool.
Output:
Question 15
Hard
What is the output of:
print(bool("False"))
print(bool("True"))
print(bool("0"))
print(bool(""))
print(bool(None))
bool() checks emptiness/zero-ness, not the content of the string.
Output:
True
True
True
False
FalseQuestion 16
Hard
What is the output of:
a = "10"
b = "20"
print(a + b)
print(int(a) + int(b))
String concatenation vs integer addition.
Output:
1020
30Question 17
Hard
Explain what dynamic typing means in Python. How is it different from static typing in Java?
Think about whether you need to declare a variable's type before using it.
In dynamic typing (Python), you do not declare a variable's type — Python infers it from the assigned value. A variable can change type:
x = 5 (int) then x = "Hello" (str) is valid. In static typing (Java), you must declare the type: int x = 5; and then x = "Hello"; causes a compile error because x was declared as int.Question 18
Hard
What does the id() function return? If a = 100 and b = 100, will id(a) == id(b) be True or False? What about a = 1000 and b = 1000?
Python caches small integers from -5 to 256.
The
id() function returns the memory address (identity) of an object. For a = 100 and b = 100, id(a) == id(b) is True because Python caches small integers (-5 to 256) and reuses the same object. For a = 1000 and b = 1000, the result may be False (in the REPL) because 1000 is outside the cached range, so Python may create two separate objects.Question 19
Easy
Create two variables: name with value "Diya" and age with value 12. Print them on one line as: Diya is 12 years old.
Use comma separation in print() or string conversion with +.
name = "Diya"
age = 12
print(name, "is", age, "years old.")Question 20
Medium
What is the output of:
score = 80
score = score + 10
score = score + 5
print(score)
Trace through each assignment. The right side is evaluated before storing.
Output:
95Mixed & Application Questions
Question 1
Easy
Write a program that creates variables for a student's name, roll number, percentage, and whether they passed. Print all four values with labels.
Use four variables with appropriate types: str, int, float, bool.
name = "Rohit Kumar"
roll_number = 23
percentage = 87.5
has_passed = True
print("Name:", name)
print("Roll Number:", roll_number)
print("Percentage:", percentage)
print("Passed:", has_passed)Question 2
Easy
Why do we use variables instead of typing values directly everywhere?
Think about what happens when a value needs to change, or when the same value is used in multiple places.
We use variables because: (1) Reusability — use the same value in many places without retyping. (2) Easy updates — change the value once and it updates everywhere. (3) Readability —
total_marks is more meaningful than 500. (4) Calculations — you can perform operations on variables and store results.Question 3
Medium
What is the output of the following code?
age = "14"
print(age + age)
print(int(age) + int(age))
age is a string (in quotes). String + string concatenates. int + int adds.
Output:
1414
28Question 4
Medium
Meera writes this code and gets an error. What went wrong and how should she fix it?
marks = 95
print("I scored " + marks + " marks")
You cannot concatenate strings and integers with +.
The error is
TypeError: can only concatenate str (not "int") to str. The + operator cannot join a string with an integer. Fix 1: print("I scored " + str(marks) + " marks") — convert marks to string. Fix 2: print("I scored", marks, "marks") — use comma separation.Question 5
Medium
What is the output of:
print(float("3"))
print(int(3.0))
print(str(42))
print(bool(3.14))
Follow each conversion function's rules.
Output:
3.0
3
42
TrueQuestion 6
Medium
What is the difference between x = y = z = 0 and x, y, z = 1, 2, 3?
One assigns the same value to all variables, the other assigns different values.
x = y = z = 0 assigns the same value (0) to all three variables. x, y, z = 1, 2, 3 assigns different values: x gets 1, y gets 2, z gets 3.Question 7
Hard
Predict the output of:
a = 5
b = a
a = 10
print(a)
print(b)
When you assign b = a, b gets the current value of a at that moment. Changing a later does not affect b.
Output:
10
5Question 8
Hard
What happens when you run: int("hello")? What about int("3.14")?
int() can only convert strings that look like valid integers.
int("hello") raises ValueError: invalid literal for int() with base 10: 'hello'. int("3.14") also raises ValueError: invalid literal for int() with base 10: '3.14'.Question 9
Hard
What is the output of:
x = 10
y = "10"
print(x == y)
print(str(x) == y)
print(x == int(y))
10 (int) and "10" (str) are different types. == compares values.
Output:
False
True
TrueQuestion 10
Hard
Write a program that swaps three variables in a circle: a has "Apple", b has "Banana", c has "Cherry". After swapping, a should have Cherry, b should have Apple, and c should have Banana.
Use multiple assignment: a, b, c = c, a, b
a = "Apple"
b = "Banana"
c = "Cherry"
a, b, c = c, a, b
print("a =", a) # Cherry
print("b =", b) # Apple
print("c =", c) # BananaQuestion 11
Medium
Arjun types: print = 5. What happens next time he tries to use print("Hello")?
print is the name of a built-in function. What happens when you assign a value to it?
He gets
TypeError: 'int' object is not callable. By writing print = 5, Arjun overwrote the built-in print function with the integer 5. Now print refers to the number 5, not the function. Calling print("Hello") is like calling 5("Hello"), which makes no sense.Question 12
Easy
What is the output of:
print(type(True))
print(type(False))
True and False are boolean values.
Output:
Multiple Choice Questions
MCQ 1
What is the correct way to create a variable in Python?
Answer: C
C is correct. In Python, you create a variable by simply writing the name, an = sign, and the value. No type declaration (Option A is Java syntax), no var keyword (Option B is JavaScript), and no let keyword (Option D is JavaScript/Swift).
C is correct. In Python, you create a variable by simply writing the name, an = sign, and the value. No type declaration (Option A is Java syntax), no var keyword (Option B is JavaScript), and no let keyword (Option D is JavaScript/Swift).
MCQ 2
What is the data type of the value 3.14?
Answer: B
B is correct. 3.14 has a decimal point, making it a float (floating-point number). int (Option A) is for whole numbers without decimals. str (Option C) would require quotes: "3.14". bool (Option D) is only True or False.
B is correct. 3.14 has a decimal point, making it a float (floating-point number). int (Option A) is for whole numbers without decimals. str (Option C) would require quotes: "3.14". bool (Option D) is only True or False.
MCQ 3
Which of these is an INVALID variable name in Python?
Answer: D
D is correct. Variable names cannot start with a digit. 2nd_place starts with '2', which is invalid. _name (starts with underscore — valid), student1 (digit at end — valid), and my_age (letters and underscore — valid) are all valid.
D is correct. Variable names cannot start with a digit. 2nd_place starts with '2', which is invalid. _name (starts with underscore — valid), student1 (digit at end — valid), and my_age (letters and underscore — valid) are all valid.
MCQ 4
What does type(42) return?
Answer: C
C is correct. 42 is an integer (a whole number without a decimal point), so type(42) returns. It would be str if it were "42" (in quotes), float if it were 42.0 (with decimal), or bool if it were True/False.
C is correct. 42 is an integer (a whole number without a decimal point), so type(42) returns
MCQ 5
What is the output of print(type("Hello"))?
Answer: A
A is correct. Text in quotes is a string, and Python's type name for strings is 'str' (abbreviated), not 'text' or 'string'. Python uses short type names: str, int, float, bool.
A is correct. Text in quotes is a string, and Python's type name for strings is 'str' (abbreviated), not 'text' or 'string'. Python uses short type names: str, int, float, bool.
MCQ 6
What are the only two values of the bool data type?
Answer: B
B is correct. The bool type has exactly two values: True and False (with capital T and F). Option A (true/false in lowercase) would cause a NameError. While True equals 1 and False equals 0 in arithmetic (Option C), 1 and 0 themselves are int values, not bool. Option D (yes/no) is not used in Python.
B is correct. The bool type has exactly two values: True and False (with capital T and F). Option A (true/false in lowercase) would cause a NameError. While True equals 1 and False equals 0 in arithmetic (Option C), 1 and 0 themselves are int values, not bool. Option D (yes/no) is not used in Python.
MCQ 7
What is the output of int(3.9)?
Answer: B
B is correct. int() truncates (removes the decimal part) — it does NOT round. So int(3.9) gives 3, not 4. This is a very common misconception. If you want rounding, use round(3.9) which gives 4.
B is correct. int() truncates (removes the decimal part) — it does NOT round. So int(3.9) gives 3, not 4. This is a very common misconception. If you want rounding, use round(3.9) which gives 4.
MCQ 8
What is the output of bool("")?
Answer: B
B is correct. An empty string "" is a falsy value in Python, so bool("") returns False. Any non-empty string (even " " or "0" or "False") returns True.
B is correct. An empty string "" is a falsy value in Python, so bool("") returns False. Any non-empty string (even " " or "0" or "False") returns True.
MCQ 9
What is the output of: print("5" + "3")?
Answer: B
B is correct. Both "5" and "3" are strings (in quotes). The + operator concatenates (joins) strings: "5" + "3" = "53". For numeric addition (8), you would need print(5 + 3) without quotes.
B is correct. Both "5" and "3" are strings (in quotes). The + operator concatenates (joins) strings: "5" + "3" = "53". For numeric addition (8), you would need print(5 + 3) without quotes.
MCQ 10
What type does division (/) always return in Python?
Answer: B
B is correct. The / operator always returns a float in Python 3, even for exact divisions like 10 / 2 (result is 5.0, not 5). If you want an integer result, use the // operator (floor division): 10 // 2 gives 5.
B is correct. The / operator always returns a float in Python 3, even for exact divisions like 10 / 2 (result is 5.0, not 5). If you want an integer result, use the // operator (floor division): 10 // 2 gives 5.
MCQ 11
What is the output of: a, b = 5, 10; print(a)
Answer: A
A is correct. In multiple assignment, a, b = 5, 10 assigns 5 to a and 10 to b. print(a) outputs 5.
A is correct. In multiple assignment, a, b = 5, 10 assigns 5 to a and 10 to b. print(a) outputs 5.
MCQ 12
Which of the following is TRUE about Python's dynamic typing?
Answer: C
C is correct. Dynamic typing means variables can change type: x = 5 (int) then x = "hello" (str) is valid. Option A describes static typing (Java). Option B is false — types can change. Option D describes compile-time type checking (static typing).
C is correct. Dynamic typing means variables can change type: x = 5 (int) then x = "hello" (str) is valid. Option A describes static typing (Java). Option B is false — types can change. Option D describes compile-time type checking (static typing).
MCQ 13
What is the output of bool("0")?
Answer: A
A is correct. "0" is a string containing the character '0'. It is a non-empty string, so bool("0") returns True. bool() checks if the string is empty, not its content. Only bool("") (empty string) returns False. Similarly, bool("False") is also True.
A is correct. "0" is a string containing the character '0'. It is a non-empty string, so bool("0") returns True. bool() checks if the string is empty, not its content. Only bool("") (empty string) returns False. Similarly, bool("False") is also True.
MCQ 14
What is the output of: print(True + True)?
Answer: C
C is correct. In arithmetic operations, True is treated as 1 and False as 0. So True + True = 1 + 1 = 2. Python does not concatenate booleans like strings — it performs numeric addition.
C is correct. In arithmetic operations, True is treated as 1 and False as 0. So True + True = 1 + 1 = 2. Python does not concatenate booleans like strings — it performs numeric addition.
MCQ 15
What happens when you run int("3.14")?
Answer: C
C is correct. int() cannot convert "3.14" directly because the string contains a decimal point. You get ValueError: invalid literal for int() with base 10: '3.14'. To convert "3.14" to an integer, use int(float("3.14")) which gives 3.
C is correct. int() cannot convert "3.14" directly because the string contains a decimal point. You get ValueError: invalid literal for int() with base 10: '3.14'. To convert "3.14" to an integer, use int(float("3.14")) which gives 3.
MCQ 16
What is the output of:
x = 10
y = x
x = 20
print(y)
Answer: A
A is correct. When y = x is executed, y gets the value 10 (the current value of x). After that, changing x to 20 does not affect y. y still holds 10. Variables for immutable types (int, float, str, bool) are independent after assignment.
A is correct. When y = x is executed, y gets the value 10 (the current value of x). After that, changing x to 20 does not affect y. y still holds 10. Variables for immutable types (int, float, str, bool) are independent after assignment.
MCQ 17
Which of the following is a valid way to swap two variables a and b in Python?
Answer: B
B is correct. a, b = b, a is Python's elegant swap syntax. Option A does NOT work: after a = b, both a and b have b's original value, so b = a just assigns that same value back. Option C is not a built-in Python function. Option D is not valid Python syntax.
B is correct. a, b = b, a is Python's elegant swap syntax. Option A does NOT work: after a = b, both a and b have b's original value, so b = a just assigns that same value back. Option C is not a built-in Python function. Option D is not valid Python syntax.
MCQ 18
What is the output of:
print(int(-2.9))
Answer: B
B is correct. int() truncates toward zero. For -2.9, truncating toward zero gives -2 (not -3). The decimal part .9 is removed. This is different from floor division, which would give -3.
B is correct. int() truncates toward zero. For -2.9, truncating toward zero gives -2 (not -3). The decimal part .9 is removed. This is different from floor division, which would give -3.
MCQ 19
Which of the following will cause a NameError?
Answer: B
B is correct. A NameError occurs when you try to use a variable that has not been defined yet. If print(x) comes before x = 5, Python does not know what x is and raises NameError: name 'x' is not defined. The other options all create variables before using them.
B is correct. A NameError occurs when you try to use a variable that has not been defined yet. If print(x) comes before x = 5, Python does not know what x is and raises NameError: name 'x' is not defined. The other options all create variables before using them.
MCQ 20
What is the output of: x = 5; x = x + 3; print(x)?
Answer: C
C is correct. x = x + 3 means: take the current value of x (5), add 3 to it (getting 8), and store the result back in x. This is reassignment, not a mathematical equation. The final value of x is 8.
C is correct. x = x + 3 means: take the current value of x (5), add 3 to it (getting 8), and store the result back in x. This is reassignment, not a mathematical equation. The final value of x is 8.
Coding Challenges
Challenge 1: Student Profile Card
EasyCreate variables for a student's name (str), age (int), height in feet (float), grade (str), and whether they are a class monitor (bool). Print all information in a formatted card.
Sample Input
(No input required)
Sample Output
=== Student Profile ===
Name: Ananya Gupta
Age: 13
Height: 5.2 feet
Grade: 8th
Class Monitor: True
Use at least one variable of each type (str, int, float, bool). Use descriptive variable names.
name = "Ananya Gupta"
age = 13
height = 5.2
grade = "8th"
is_monitor = True
print("=== Student Profile ===")
print("Name:", name)
print("Age:", age)
print("Height:", height, "feet")
print("Grade:", grade)
print("Class Monitor:", is_monitor)Challenge 2: Type Detective
EasyWrite a program that creates one variable of each type (int, float, str, bool) and prints the value along with its type for each variable.
Sample Input
(No input required)
Sample Output
Value: 42 | Type: <class 'int'>
Value: 3.14 | Type: <class 'float'>
Value: Hello | Type: <class 'str'>
Value: True | Type: <class 'bool'>
Create exactly 4 variables, one of each basic type. Print both the value and type() result for each.
a = 42
b = 3.14
c = "Hello"
d = True
print("Value:", a, "| Type:", type(a))
print("Value:", b, "| Type:", type(b))
print("Value:", c, "| Type:", type(c))
print("Value:", d, "| Type:", type(d))Challenge 3: Temperature Converter
MediumCreate a variable celsius with a temperature value. Convert it to Fahrenheit using the formula: F = (C * 9/5) + 32. Print both the Celsius and Fahrenheit values. Use type() to show the types.
Sample Input
(No input required)
Sample Output
Celsius: 37
Fahrenheit: 98.6
Celsius type: <class 'int'>
Fahrenheit type: <class 'float'>
Start with celsius as an integer. The formula should produce a float automatically.
celsius = 37
fahrenheit = (celsius * 9/5) + 32
print("Celsius:", celsius)
print("Fahrenheit:", fahrenheit)
print("Celsius type:", type(celsius))
print("Fahrenheit type:", type(fahrenheit))Challenge 4: Type Conversion Chain
MediumStart with the string "42". Convert it to int, then to float, then back to str, then to bool. Print the value and type at each step.
Sample Input
(No input required)
Sample Output
Step 1 (str): 42 | <class 'str'>
Step 2 (int): 42 | <class 'int'>
Step 3 (float): 42.0 | <class 'float'>
Step 4 (str): 42.0 | <class 'str'>
Step 5 (bool): True | <class 'bool'>
Show each step clearly with labels. Use type() at each step.
val = "42"
print("Step 1 (str):", val, "|", type(val))
val = int(val)
print("Step 2 (int):", val, "|", type(val))
val = float(val)
print("Step 3 (float):", val, "|", type(val))
val = str(val)
print("Step 4 (str):", val, "|", type(val))
val = bool(val)
print("Step 5 (bool):", val, "|", type(val))Challenge 5: Variable Swap Challenge
MediumCreate three variables a, b, c with values 1, 2, 3 respectively. Swap them so that a=3, b=1, c=2. Print the values before and after swapping.
Sample Input
(No input required)
Sample Output
Before: a=1, b=2, c=3
After: a=3, b=1, c=2
Use Python's multiple assignment for the swap. Do not use a temporary variable.
a, b, c = 1, 2, 3
print("Before: a=" + str(a) + ", b=" + str(b) + ", c=" + str(c))
a, b, c = c, a, b
print("After: a=" + str(a) + ", b=" + str(b) + ", c=" + str(c))Challenge 6: Bill Calculator
MediumCreate variables for three items with their prices (use floats). Calculate the total, the GST (18%), and the final amount. Print a formatted bill.
Sample Input
(No input required)
Sample Output
=== BILL ===
Item 1 (Notebook): Rs 45.50
Item 2 (Pen): Rs 15.00
Item 3 (Eraser): Rs 8.75
Subtotal: Rs 69.25
GST (18%): Rs 12.465
Total: Rs 81.715
Use float variables for prices. Calculate GST as 18% of subtotal. Calculate total as subtotal + GST.
item1_name = "Notebook"
item1_price = 45.50
item2_name = "Pen"
item2_price = 15.00
item3_name = "Eraser"
item3_price = 8.75
subtotal = item1_price + item2_price + item3_price
gst = subtotal * 18 / 100
total = subtotal + gst
print("=== BILL ===")
print("Item 1 (" + item1_name + "):", "Rs", item1_price)
print("Item 2 (" + item2_name + "):", "Rs", item2_price)
print("Item 3 (" + item3_name + "):", "Rs", item3_price)
print()
print("Subtotal: Rs", subtotal)
print("GST (18%): Rs", gst)
print("Total: Rs", total)Challenge 7: Bool Truthiness Tester
HardWrite a program that tests the bool() function with 10 different values and prints whether each is truthy or falsy. Include: 0, 1, -5, 0.0, 3.14, "", "Hello", "0", True, False.
Sample Input
(No input required)
Sample Output
bool(0) = False (Falsy)
bool(1) = True (Truthy)
bool(-5) = True (Truthy)
bool(0.0) = False (Falsy)
bool(3.14) = True (Truthy)
bool('') = False (Falsy)
bool('Hello') = True (Truthy)
bool('0') = True (Truthy)
bool(True) = True (Truthy)
bool(False) = False (Falsy)
Test exactly these 10 values. Print the bool() result and label each as Truthy or Falsy.
print("bool(0) =", bool(0), "(Falsy)")
print("bool(1) =", bool(1), "(Truthy)")
print("bool(-5) =", bool(-5), "(Truthy)")
print("bool(0.0) =", bool(0.0), "(Falsy)")
print("bool(3.14) =", bool(3.14), "(Truthy)")
print("bool('') =", bool(""), "(Falsy)")
print("bool('Hello') =", bool("Hello"), "(Truthy)")
print("bool('0') =", bool("0"), "(Truthy)")
print("bool(True) =", bool(True), "(Truthy)")
print("bool(False) =", bool(False), "(Falsy)")Challenge 8: Dynamic Typing Demonstration
HardWrite a program that demonstrates dynamic typing by assigning 5 different types of values to the same variable. Print the value, type, and id after each assignment.
Sample Input
(No input required)
Sample Output
Assignment 1: x = 42
Value: 42 | Type: <class 'int'> | ID: 140234567890
Assignment 2: x = 3.14
Value: 3.14 | Type: <class 'float'> | ID: 140234567920
(etc.)
Use at least 5 different types of values (int, float, str, bool, and one more). Show that the id changes with each reassignment.
x = 42
print("Assignment 1: x = 42")
print(" Value:", x, "| Type:", type(x), "| ID:", id(x))
x = 3.14
print("Assignment 2: x = 3.14")
print(" Value:", x, "| Type:", type(x), "| ID:", id(x))
x = "Python"
print("Assignment 3: x = 'Python'")
print(" Value:", x, "| Type:", type(x), "| ID:", id(x))
x = True
print("Assignment 4: x = True")
print(" Value:", x, "| Type:", type(x), "| ID:", id(x))
x = None
print("Assignment 5: x = None")
print(" Value:", x, "| Type:", type(x), "| ID:", id(x))Challenge 9: Data Type Cheat Sheet
HardWrite a comprehensive program that serves as a reference for data types and type conversion. Show examples of: creating each type, converting between types, common edge cases (int(3.9), bool(""), etc.), and dangerous conversions that cause errors (inside comments).
Sample Input
(No input required)
Sample Output
=== Python Data Types Cheat Sheet ===
--- Creating Variables ---
Integer: 42 (<class 'int'>)
Float: 3.14 (<class 'float'>)
String: Hello (<class 'str'>)
Boolean: True (<class 'bool'>)
--- Type Conversion ---
int('42') = 42
float(42) = 42.0
str(42) = 42
bool(42) = True
--- Edge Cases ---
int(3.9) = 3 (truncates, not rounds!)
bool('') = False (empty string)
bool('0') = True (non-empty string!)
bool(0) = False (zero)
10 / 2 = 5.0 (always float!)
--- Errors (commented in code) ---
# int('hello') -> ValueError
# int('3.14') -> ValueError
=== End of Cheat Sheet ===
Cover all 4 data types, at least 4 type conversions, at least 4 edge cases, and at least 2 error-causing conversions (in comments).
print("=== Python Data Types Cheat Sheet ===")
print()
print("--- Creating Variables ---")
print("Integer:", 42, type(42))
print("Float:", 3.14, type(3.14))
print("String:", "Hello", type("Hello"))
print("Boolean:", True, type(True))
print()
print("--- Type Conversion ---")
print("int('42') =", int("42"))
print("float(42) =", float(42))
print("str(42) =", str(42))
print("bool(42) =", bool(42))
print()
print("--- Edge Cases ---")
print("int(3.9) =", int(3.9), "(truncates, not rounds!)")
print("bool('') =", bool(""), "(empty string)")
print("bool('0') =", bool("0"), "(non-empty string!)")
print("bool(0) =", bool(0), "(zero)")
print("10 / 2 =", 10 / 2, "(always float!)")
print()
print("--- Errors (commented in code) ---")
# int('hello') -> ValueError: invalid literal
# int('3.14') -> ValueError: invalid literal
print("# int('hello') -> ValueError")
print("# int('3.14') -> ValueError")
print("=== End of Cheat Sheet ===")Need to Review the Concepts?
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