Why does a finer clock suddenly show real times, and what does it look like when a function's runtime never moves at all?
Short drills on what this video just taught. Write the code, run the checks, and reveal the answer only if you are stuck.
The ordinary clock moves in whole ticks of about a thousandth of a second: at any instant it shows the last tick that has passed, not the nearest one, so 12.3456 seconds reads as 12.345. The // operator may be useful. Define tick_reading(instant, tick) that returns what a clock with tick size tick shows at the true time instant (both in seconds).