Use of Will and going to in these sentences

[greystroke]

Hi,

Its said that will is not used when talking of things we have already arranged and decided to do.

But what about a sentence like this.

I will be in chennai next week.

Haven't we already decided and arranged to be in chennai and isnt this a correct sentence?

Can someone please clarify?

Thanks,

Arun

[5jj]

It's said that 'will' is not used when talking of things we have already arranged and decided to do.
It is said by whom?
It might be better to say, "We tend not to use 'will' if we wish to suggest that the future situation has been arranged".

But what about a sentence like this: 'I will be in c Chennai next week.'
Haven't we already decided and arranged to be in c Chenna, and isn't this a correct sentence?
It is fine, but it presents the being in Chennai simply as a future certainty.

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