Chapter 2: Python Basics Exercises

Exercise 1

Variable Swap

Create a program that swaps the values of two variables.

                        # Start with these variables

                        a = 10

                        b = 20

                        # Your code to swap values

                        # Print both variables after swapping

Initialize two variables with different values

Swap their values without using a temporary variable

Print the values before and after swapping

Hint

You can use tuple unpacking: a, b = b, a

Exercise 2

Data Type Exploration

Create variables of different data types and examine their properties.

                        # Create variables of different types

                        integer_var = 10

                        float_var = 3.14

                        string_var = "Hello"

                        bool_var = True

                        # Print their types and values

                        # Use the type() function

Create variables of int, float, string, and bool types

Print the type of each variable using type()

Try converting between types using int(), float(), str()

Exercise 3

User Input Processing

Create a program that takes user input and processes it.

                        # Ask user for their name and age

                        name = input("What is your name? ")

                        age = input("How old are you? ")

                        # Calculate year of birth

                        # Print a personalized message

Use input() to get user's name and age

Convert age to integer

Calculate approximate year of birth

Print a message like "Hello [name], you were born in [year]"

Exercise 4

String Manipulation

Practice various string operations and methods.

                        # Start with this string

                        text = " Python Programming is Fun! "

                        # Perform these operations:

                        # 1. Remove whitespace from both ends

                        # 2. Convert to lowercase

                        # 3. Replace "Fun" with "Awesome"

                        # 4. Split into words

Use strip() to remove whitespace

Use lower() to convert to lowercase

Use replace() to change words

Use split() to create a list of words

Print each result

Exercise 5

Type Conversion Challenge

Practice converting between different data types.

                        # Start with these values

                        num_str = "123"

                        pi_str = "3.14"

                        number = 100

                        # Convert between types

                        # 1. Convert num_str to integer

                        # 2. Convert pi_str to float

                        # 3. Convert number to string

                        # 4. Try converting "hello" to integer (handle the error)

Convert string to integer

Convert string to float

Convert integer to string

Try invalid conversion and handle ValueError

Exercise 6

Simple Calculator

Create a basic calculator that takes two numbers and an operator.

                        # Get two numbers and an operator from user

                        num1 = float(input("Enter first number: "))

                        operator = input("Enter operator (+, -, *, /): ")

                        num2 = float(input("Enter second number: "))

                        # Perform calculation based on operator

                        # Print the result

Get two numbers from user (convert to float)

Get an operator (+, -, *, /)

Use if/elif to perform the correct operation

Print the equation and result: "5.0 * 3.0 = 15.0"

Exercise 7

String Formatting Practice

Practice different ways to format strings in Python.

                        # Create variables

                        item = "book"

                        price = 15.99

                        quantity = 3

                        # Format strings using:

                        # 1. f-strings

                        # 2. .format() method

                        # 3. % formatting

                        # Print all three versions

Use f-string: f"You bought {quantity} {item}s for ${price*quantity:.2f}"

Use format: "You bought {} {}s for ${:.2f}".format(quantity, item, price*quantity)

Use % formatting: "You bought %d %ss for $%.2f" % (quantity, item, price*quantity)

Compare the results

Exercise 8

Boolean Expressions

Practice using boolean expressions and comparisons.

                        # Get user input

                        age = int(input("Enter your age: "))

                        temperature = float(input("Enter temperature: "))

                        # Check these conditions:

                        # 1. Is age greater than or equal to 18?

                        # 2. Is temperature between 20 and 30 degrees?

                        # 3. Is age not equal to 30?

                        # Print the results

Get age and temperature from user

Check if age is >= 18

Check if temperature is between 20 and 30 (inclusive)

Check if age is not equal to 30

Print the results of each check

Exercise 9

Dynamic Typing Demonstration

Demonstrate Python's dynamic typing feature.

                        # Create a variable and change its type

                        variable = 10

                        print(type(variable))

                        # Change to string

                        variable = "Hello"

                        print(type(variable))

                        # Change to float

                        variable = 3.14

                        print(type(variable))

                        # Change to boolean

                        variable = True

                        print(type(variable))

Create a variable and assign it an integer value

Print its type

Reassign to a string and print type

Reassign to a float and print type

Reassign to a boolean and print type