Importance of Comments

I notice that some scriptwriters put a lot of comments in their code. Is this really necessary? It takes a long time to do and seems like a waste of time.

Comments in your code are a professional courtesy to those who will maintain your code. Keep in mind that you might be one of those code-maintenance people and that the purpose and operation of a script that seems clear today might be less obvious to you and others in 6 months.

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