KnowCardPython · Math, random & Decimal
What does this print? ``` from decimal import Decimal print(Decimal("0.1") + Decimal("0.2")) ```
Answer locked. Get the free KnowCard app to reveal it — plus spaced-repetition review so it actually sticks.
More in Math, random & Decimal
What does this print?
```
print(round(0.5), round(2.5))
print(round(1.5), round(3.5))
```
You need to round prices half-up (2.5 -> 3, never 2). Why won't built-in round() do it, and what does?
What is the difference in result and return type between math.floor(-2.5), math.trunc(-2.5), and math.ceil(-2.5)?
You compare two values near zero with math.isclose(a, 0.0). Why might it return False even when a is tiny, and how do you fix it?
What does this print?
```
import math
nan = math.nan
print(nan == nan)
print(math.isnan(nan))
```
What does this print, and what's the bug?
```
from decimal import Decimal
print(Decimal(0.1))
```
Start learning today
Free to start — download the app or use it in your browser.