Hi Shilpa.
If the source code is available publicly, then you can use the following command in the MATLAB command line:
>> edit <function_name>
It will open up the file where you can either see the documentation or the source code.
If it shows documentation, then it means that the source code is unavailable publicly. For example, if you try to use the "edit sort" command, then you will see something like the following:
