Why are back slashes used in the statement:

      System.out.println( "usage: java Palindrome \"Trial String\" " );

A good answer might be:

Without the back slash, the quote mark that follows it would terminate the string, rather than be included in it.

Often an input string contains groups of characters that have a meaning. Such a group is called a token. Tokens are separated from each other by delimiter characters. For example, say that you were asked to add up the following numbers:

12  8  5  32

You automatically grouped these characters to form four integers separated by spaces. The tokens in this case are "12", "8", "5", and "32". These tokens were delimited by the space character.

What makes a token and what makes a delimiter depends on the application.

QUESTION 12:

Examinine the following:

643,983,104

(Trick Question: ) How many tokens are there? What are the delimiters?