What is the purpose of having a countdown during a rocket launch?
The countdown is primarily used to confirm that all systems are go before the rocket is ignited. It also provides a clearly defined moment in time when the launch will occur. As the countdown progresses, various checks and procedures are carried out to ensure that all systems are operating correctly. Once the countdown reaches zero, the rocket is ignited and the launch begins.
First, the countdown has a technical function: It enables the sequential execution of several preparatory actions that must be accomplished before the launch.

It is a way of coordinating and executing a series of complex processes that need to occur in a specific order leading up to ignition. The countdown sequence covers the following stages:

1. Propellant loading: Filling the rocket's tanks with fuel and oxidizer.
2. Power-