Python Numeric Types, Conversion, and String Operations

All flashcards

What happens when an arithmetic operation combines an integer and a float?

Python performs the numeric operation and produces a float result. For example, `3 * 5.0` evaluates to `15.0`.

What does `input()` return, and why does that matter?

`input()` returns a string, even if the user types digits. Convert the result with `int()` or `float()` before using it in numeric calculations.

What is string concatenation?

String concatenation joins strings using `+`. Both operands should be strings, so convert a number with `str()` before joining it with text.

What does the `/` operator return?

The `/` operator always returns a float, including when the division has no fractional part; for example, `6 / 2` produces `3.0`.

How does string repetition work?

The `*` operator repeats a string when paired with an integer. For example, `"banjo" * 3` produces `"banjobanjobanjo"`.

Quiz questions

1. What data type results from multiplying an integer by a float in Python?Answer: A float
2. What data type does `input()` return by default?Answer: A string
3. What type of value does the `/` operator produce in Python?Answer: A floating-point number
4. A program reads a quantity with `input()` and needs to multiply it by a price. What should it do first?Answer: Parse the quantity with `int()` or `float()`.
5. How can a program create the text `"2.345"` from the integer `2` and the string `"345"`?Answer: Convert `2` to a string, then concatenate the pieces.