Sum without overflowing in Rust
Rust interview exercise on Vectors & Slices, difficulty 1 of 3. Solve it in the editor beside a worked example, or cold in Interview mode with the example hidden; the tests run the moment you do.
Write sum_of(nums) that adds up a slice of i32. Return an i64: two large i32 values overflow an i32, which panics in a debug build.
Each exercise pairs a worked example with a twin problem to solve in a real editor; the tests run the moment you do. Interview mode hides the example: solve it from memory, without the hint or the solution, and it counts as solved cold. Progress is saved in your browser, and in your account if you sign in.