Editing AWK (section)

=== Variables and syntax ===

Variable names can use any of the characters [A-Za-z0-9_], with the exception of language keywords, and cannot begin with a numeric digit. The operators ''+ - * /'' represent addition, subtraction, multiplication, and division, respectively. For string [[concatenation]], simply place two variables (or string constants) next to each other. It is optional to use a space in between if string constants are involved, but two variable names placed adjacent to each other require a space in between. Double quotes [[delimit]] string constants. Statements need not end with semicolons. Finally, comments can be added to programs by using ''#'' as the first character on a line, or behind a command or sequence of commands.