Скачать или смотреть Python Coding Interview Questions - Part 14 | Convert Float to Int Safely

Is int(x) always the right choice? In Part 14 of our Python Interview series, we explore the "Safe" way to handle float-to-int conversion without losing critical data.

In 2026, senior engineers are expected to know the difference between Truncation, Floor, Ceiling, and Rounding. We dive into why int() can be dangerous for negative numbers and how "Banker's Rounding" in Python can surprise you during a technical screen. Whether you are building a checkout system or a physics engine, choosing the wrong conversion method is an "instant fail" in many interviews—we'll make sure you get it right.

Interview Questions Answered:

Truncation vs. Floor: Why int() and math.floor() behave differently with negative numbers (e.g., -3.1).

The Banker's Rounding Trap: Why round(2.5) is 2, but round(3.5) is 4.

Ceiling for Resources: Using math.ceil() to calculate things like the number of pages or shipping boxes.

Precision Handling: How to deal with the classic 0.1 + 0.2 floating-point error before converting to an integer.

Safety First: Handling NaN (Not a Number) and Infinity values that crash standard conversion logic.