The Launch Sequence

Mission Briefing

Mission Control requires a manual override for the rocket sequence. You must program the countdown module to fire backwards from a dynamic starting point.

The Concept: Backwards Loops

Loops don't just go up! To go backwards, you set your initialization to a high number, check that it stays above a minimum, and use i-- to decrement instead of increment.

The Objective

Your function receives a number start.

1. Use a loop to build a countdown string from start down to 1.
2. Separate the numbers with dashes (-).
3. For example, if start is 5, return "5-4-3-2-1". Do not include a trailing dash.