The comment element serves to write own comments into the program, without interfering with the program performance. One of the features of the comment element is that any other elements can be stored in the comment in the function contents editing field. During the program execution these elements will be ignored. This feature can be used when it is necessary to insert an element into a program branch. First the branch end is laid aside into the comment, then the element needed is inserted, and the branch end is then put back to the element inserted.