When drawing workflow, what do various shapes mean, such as triangle, diamond and box.

Flat circle: indicates the beginning and end of the program.

Box: indicates the process to be executed.

Parallelogram: Represents data input.

Irregular graphics: indicates data output or report printing.

Diamond: indicates a decision or judgment (for example, if ... and then ... Else).

Arrow: indicates the direction of program execution.

Letters in the circle indicate page change. When a page can't be drawn, you can use this icon to indicate the number of pages to be changed, in English or numbers.