How many exact decimals can offer Matlab?

Question

Popescu Daniela 2012-4-2

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https://ww2.mathworks.cn/matlabcentral/answers/34251-how-many-exact-decimals-can-offer-matlab

Hi, everybody. I would like to know how many exact decimals can offer Matlab. I did a program to calculate Viete sums and run it and I can see only 4 exact decimals in the answers. Thats all matlab can offer or there is a setting where I can change precision? Thank you, Daniela

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Answer 1

the cyclist 2012-4-2

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https://ww2.mathworks.cn/matlabcentral/answers/34251-how-many-exact-decimals-can-offer-matlab#answer_42929

在 MATLAB Online 中打开

If you type

>> format long

you will see about 15 digits of precision. By default, MATLAB does numerical calculations on double-precision floating point numbers, but uses the "short" display format. You can read a bit more with

>> doc format

There is a lot more that can be said, but maybe that's enough for you to know to start?