Python Programming

A Python program is a sequence of statements evaluated by the interpreter. A variable name refers to a value such as an integer, string, Boolean, or collection.

A temperature converter reads a Celsius value, computes `(celsius * 9 / 5) + 32`, and prints a labeled Fahrenheit result.

Write a short script that asks for a name and a temperature, then prints a friendly message with the converted value.

Use `input()` for text, convert the numeric input with `float()`, calculate the Fahrenheit value, then format it in an f-string. Keep the name as a string.

A conditional selects a block of code based on a Boolean expression. `if`, `elif`, and `else` make mutually exclusive paths explicit.

A shipping calculator applies a free-shipping rule when an order total reaches a threshold; otherwise it adds a delivery fee.

Classify a score as below pass, pass, or distinction, and state how a score exactly on each boundary should behave.

Use an `if` branch for scores below the pass boundary, an `elif` branch for the pass range, and `else` for the remaining range. Confirm whether boundaries use `<` or `<=`.

A loop repeats a block. `for` visits items in an iterable; `while` repeats while a condition remains true. Lists store ordered, changeable collections of values.

A receipt totals a list of prices by adding one price to a running total during each loop iteration.

Given a list of quiz scores, calculate the count and average of scores above a chosen threshold.

Initialize a count and sum to zero; visit each score; update both when it qualifies. Divide by the count only after checking that the count is not zero.

A function is a named unit of behavior that accepts inputs, performs a focused task, and may return a result.

A `calculate_total(prices, tax_rate)` function returns the subtotal plus tax; a separate display function formats the result for a receipt.

Refactor a repeated discount calculation into a function and describe its input, output, and one edge case.

Accept the original price and discount rate as parameters, return the computed price, and test a zero discount and a rate outside the allowed range.

A class describes a kind of object. An object combines state stored in attributes with behavior implemented by methods.

A `BankAccount` class stores a balance and exposes deposit and withdraw methods that reject invalid amounts.

Sketch a small quiz application: identify one class, its state, two methods, and one rule that prevents invalid state.

A `Question` can hold a prompt, choices, and correct answer; a method can check a submitted choice. Validate that the answer is one of the offered choices.