Function is computing the two values, there are two output arguments in the function header (i.e., area & circum), that are placed in the square brackets [ ]. And hence, somewhere in the body of the function, the values have to be assigned to both. As the function is returning two values, it is significant to capture and store them in separate variables when the function is called, merely as both the number of rows and the number of columns would be captured from the size function. In this situation, the first value returned, that is the area of the circle, is stored in the variable a and the second value returned is stored in the variable c.
>> [a c] = areacirc(4)
If this is not completed, only the first value returned is maintained; in this situation, the area will be:
Note that in capturing the values the order matter. In this situation, the function returns at first the area & then next the circumference of the circle. The order in which the values are assigned to the output arguments within the function, though, does not matter.
The help function represents the comment listed under the function header:
>> help areacirc
This function computes the area and
the circumference of a circle