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

Answer 1

[the cyclist]

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?

Answer 2

[Jonathan Sullivan]

Change the display format.

Try:

format long
X % Your variable