Try It Yourself: Console I/O

Write a program that computes the sum of any number of integers given by the user. The program should prompt the user for the next number until the user enters 'q'. The program should then report the sum of the numbers.

Example execution:
```
Enter an integer: 20
Enter an integer: 5
Enter an integer: -10
Enter an integer: q
The sum is 15
```

Write a code fragment that repeatedly prompts the user for a directory and prints out the number of items in the directory and the contents of the directory. For each item contained in the directory, if the item is itself a directory, the directory name should be printed (with a slash, '\', at the end of it) followed by the number of items in that directory. If the item is a file, the file name should be printed unless the file name starts with a '.' (a dot, or period).

Example execution:

Please enter a directory: U:\private

Contents of U:\private  6 items
	test.txt
	Notes\  10 items
	CodeWarrior\  5 items
	temp.html

Again? y
Please enter a directory: U:\private\temp.html
U:\private\temp.html is not a directory
Please enter a directory: U:\private\Notes

Contents of U:\private\Notes  10 items
	Ch1.doc
	Ch2.doc
	Ch3.doc
	Ch4.doc
	Ch5.doc
	Ch6.doc
	Ch7.doc
	Ch8.doc
	Ch9.doc
	Ch10.doc

Again? y
Please enter a directory: U:\private\CodeWarrior\HeroesQuest

Contents of U:\private\CodeWarrior\HeroesQuest  5 items
	Written4.txt
	AppClasses.jar
	HeroesQuest.java
	HeroesQuest.mcp
	HeroesQuest_Data\  3 items

Again? n