Help command:
The help command is used with the script rectarea, the function readlenwid, and the major function printrectarea. To see the first comment in the subfunction, as it is contained within the file printrectarea.m, the operator
> is used to identify both the primary and subfunctions:
>> help rectarea
This program computes & prints the rectangle area
>> help printrectarea
This function prints the area of rectangle
It calls the subfunction to compute the area
>> help printrectarea>calcrectarea
This function computes the rectangle area