How to Write Your First ROS 2 Node? (Publisher & Subscriber) | Beginner Tutorial

Please tell me if I have done something wrong or you have extra questions.
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[ How to run your code? ]:
(Build the workspace):
colcon build --packages-select my_first_package

(Test the topic - Mid-Point Check):
ros2 topic echo /robot_news

(Run your nodes):
ros2 run my_first_package talker
ros2 run my_first_package listener
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[ Resources ]:
Check the comment section for the Github task to practice with.

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(Music used):
massobeats - rose water
https://www.youtube.com/watch?v=xakBzg5atsM

Видео How to Write Your First ROS 2 Node? (Publisher & Subscriber) | Beginner Tutorial канала FlowCore