Data Conversion functions. For example, it will convert an input text character 2 to a valid number before performing arithmetic operations. It will convert a date to a text string using the default format before output. Will convert the number to a text string. The sequence structure specifies that program statements are executed in sequential order.
Selection specifies a choice between two actions.
This statement is similar to IF statements in Visual Basic. The difference relates to the use of the semicolon. Iteration specifies repeated execution of one or more statements. The EXIT is used to jump out of the loop. In this form, the condition is specified after the WHEN clause, and this controls termination of the loop.