MATLAB Answers

How does round work?

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Tyler Murray
Tyler Murray on 10 Nov 2016
Answered: Walter Roberson on 10 Nov 2016
I was trying to figure out how the function round worked. I know the format and everything, I am talking about the actual source code. I tried typing in EDIT round but only instructions came up. The only thing that I can think of is if you have a number like 3.14 you would have to convert that number to a string to determine what character the decimal point is at. From there you can take the number to the right and continue with the appropriate rounding. I just don't understand how MATLAB determines where the decimal is located. Any guesses?

Answers (2)

Steven Lord
Steven Lord on 10 Nov 2016
We do not distribute the source code for the built-in round function. If you want to see it you will need to start here.
You may be interested in the general procedures described on Wikipedia.
  1 Comment
Tyler Murray
Tyler Murray on 10 Nov 2016
I'm not asking for a source code, I am just asking people how they think it is programmed. Just curious.

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