, (Object control)

Appends a value to the end of a list, with an empty name. The list will be modified.

list

is a builtin-list or a structure to append to.
The

value

to append.

list

is the same builtin-list or a structure provided as an argument, with the new value appended.

a: (1 2); a print LF print a 3 , print LF print a print

Output:

( 1 2 ) ( 1 2 3 ) ( 1 2 3 )