I am aware that for comments we have maximum of 600 characters to type and by curiosity I just happened to type some random words in a comment box. I expected that when comment exceeded 600 characters I will not be able to type but instead it showed - 'you exceeded X characters'. I am just curious but afraid to do this - what happens if I post a comment with more than 600 characters?

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    $\begingroup$ If only there was a way for you to try that yourself... $\endgroup$ – Asaf Karagila Dec 28 '20 at 18:47
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    $\begingroup$ What happens is the comment you try to post will be rejected (you will not be able to submit it) unless or until you lower the character count. I.e., SE software ensures that no one can post a comment with more than 600 characters, by design. $\endgroup$ – amWhy Dec 28 '20 at 18:50
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    $\begingroup$ @Asaf "but [they are] afraid to do this". $\endgroup$ – quid Dec 28 '20 at 19:49
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    $\begingroup$ @AsafKaragila - I think it's nice that the OP didn't to trash up a post with their test comment. Probably unnecessary, but still nice. $\endgroup$ – JonathanZ supports MonicaC Dec 28 '20 at 22:12

In a way literally nothing happens. You click "Add Comment" and the situation stays unchanged. The "too long by" flickers briefly, but that's it.

As explained in a comment by amWhy there is a check on submission.

I dimly recall that in the very early days this was handled much less gracefully, and the text in the comment box got cleared instead.


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