Question

I created a function with a cursor to count all the entrees in my other table.
When I do PRINT dbo.cursorEnroll ();
I get 11 as an output when I only had 10 entrees in my table.
@@FETCH = 0 should mean fetch is successful, and thus should only SET studentsEnrolled 10 times. I am confused where this extra count comes from.

DISCLAIMER: I know this isn’t the best way to count the number of entries in a table. However, I am just learning and practicing the use of cursors.

CREATE FUNCTION dbo.cursorEnroll ()
    RETURNS INT AS
    BEGIN
        DECLARE @studentsEnrolled INT
        SET @studentsEnrolled = 0
        DECLARE myCursor CURSOR FOR
            SELECT enrollementID
                FROM courseEnrollment
        OPEN myCursor;

        FETCH NEXT FROM myCursor INTO @studentsEnrolled

        WHILE @@FETCH_STATUS = 0
            BEGIN
                SET @studentsEnrolled = @studentsEnrolled+1
                    FETCH NEXT FROM myCursor INTO @studentsEnrolled
            END;
        CLOSE myCursor
        RETURN @studentsEnrolled

    END;

Answer 1

Because you fetch enrollementID into @studentsEnrolled and then add 1. For last row enrollementID = 10 then you get 11 as result.