White space is conceptually those characters which do not print but control where the next character will appear. White space serves to separate tokens (defined in a different lesson) and it helps to arrange the two dimensional visual appearance of the text in a program (on the page or screen) so that the structure of the program to a human reader of the source file is much clearer. Some white space is required to separate otherwise adjacent keywords, identifiers and constants.
White space consists of any sequence of:
SYMBOL ASCII CODE NAME
------ ---------- --------------
HT 7 horizontal tab
LF 10 new line
VT 11 vertical tab
FF 12 form feed
SP 32 space
A comment is also considered to be white space.