Whitespace characters are spaces, newlines, tabs, and page breaks. Whitespace is used to improve the readability of your programs and to separate tokens from each other, when necessary. (A token is an
indivisible lexical unit such as an identifi er or number.) Whitespace is otherwise insignifi cant. Whitespace may occur between any two tokens, but not within a token. Whitespace may also occur inside a string, where it is signifi cant.