The following are functions which provide procedural programming
capabilities as found in languages such as Pascal, C and Ada.
12.6.1 Binding Variables
12.6.2 If...then...else Function
12.6.3 While
12.6.4 Loop-for-count
12.6.5 Progn
12.6.6 Progn$
12.6.7 Return
12.6.8 Break
12.6.9 Switch