A Assignment

1. Exercise

How do we store and manage data in a program?

Answer in your own words.

  • Explain how data is stored and managed in a program.
  • Why is it important to organize data instead of working only with raw values?
  • Can variables change their value or data type?

2. Exercise

Define 4 variables with meaningful names and different data types.

Write your solution as a Python code.

Use this data types:

  • A integer
  • A string
  • A float
  • A boolean

Then, use print() to display each variable together with its data type using the type() function.

Example output format:

print("Price:", price, "| Type:", type(price))

3. Exercise

Mathematical operations and using the math library

Write your solution as a Python code.

  • Import the math module.
  • Define two integer variables.
  • Use the following math functions:
    • pow(), sqrt(), log()
  • Use // (floor division) and % (modulo).
  • Store the results in new variables.
  • Print each result together with its type using type().

Make sure your variable names clearly describe what they store.

👉 Your print() statements should be well-formatted and readable – include clear labels for both the result and the data type.

Example:

print("Square root of x:", root_x, "| Type:", type(root_x))

4. Exercise

Boolean values and comparisons

Write your solution as a Python code.

  • Define at least three boolean variables with meaningful names and print them.
  • Define four numeric variables.
  • Calculate the square root of each number.
  • Compare the square roots using the greater-than operator (>).
  • Print whether one value is greater than another.

Bonus: Try using combinations of comparisons, like:

print(root_a > root_b and root_c > root_d)

5. Exercise

Strings and slicing

Write your solution as a Python code.

In this task, you will practice working with strings using only slicing ([:]) – no other string functions or methods.

  1. Ask the user to input the following information using the input() function:
    • First name
    • Last name
    • Street address
    • City
    • Age (as string)
  2. Use slicing to:
    • Extract the first 3 letters of the first name.
    • Extract the last 2 letters of the last name.
    • Extract the first 5 characters of the address.
    • Extract the last 3 characters of the city.
    • Extract only the first digit of the age string.
    • Print all characters of the first name except the last one using [:-1] and explain what this slicing does.
    • Replace the first letter of the last name by concatenating slices (e.g., change “Klein” to “Blein”).
    • Create a new string from the city where the middle part is removed using slicing.
  3. Use print() to show the results with labels. All outputs should be clearly formatted.

👉 Make sure to test your code with different inputs and see how slicing behaves.

6. Bonus Exercise

Converting Data Types in Python

Write your solution as a Python code.

You are developing a program for managing bakery orders. Simulate user input by defining all inputs as strings:

product_name = "Wholegrain Bread"
price = "3.79"         # net price (without tax)
quantity = "12"
available = "True"

Your tasks:

  1. Convert:
    • price → float
    • quantity → int
    • available → boolean

  2. Print each converted value and its data type using type().
    Make sure the output is clearly formatted and easy to read.

  3. Calculate total net price:
    • Multiply quantity by net price
    • Store and print result with its type
  4. Calculate total gross price (including 19% tax):
    • Calculate 19% of the total net price
    • Add it to the net total
    • Store and print the gross price and its type
  5. Reverse conversion:
    • Convert the total gross price back to a string
    • Create a sentence like:
      "12 Wholegrain Bread cost 45.48 euros (including tax)."
    • Print the final sentence

Updated: