This is why Rust has `abs`, `checked_abs`, `wrapping_abs`, `overflowing_abs`, `saturating_abs` and `unsigned_abs`. Checked returns a Result enum that is an err

This is why Rust has `abs`, `checked_abs`, `wrapping_abs`, `overflowing_abs`, `saturating_abs` and `unsigned_abs`. Checked returns a Result enum that is an error on overflow, wrapping silently wraps (as in your answer), overflowing wraps but has a boolean indicator whether a wrap has occurred, saturating bounds at the types limits rather than wrapping and unsigned abs always gives the correct result albeit as a different type. The unqualified abs panics on overflow on debug but silently wraps on release mode, like all Rust arithmetic code does by default.