Loop Basics

Reading

• Read this code. (Remember to run the code for yourself, see what it does, and try experimenting with it. Here are the instructions.)

Important concepts

• for-each loop
• while loop
• C-style for loop
• break, continue
• infinite loop
• off-by-one error

Things to consider (exercises for yourself, not to turn in)

1. What is the purpose of each of the three expressions that appear in the control line of a C-style for loop?

2. The reading mentions three common looping patters that we use in programming:

   Pattern name	Java idiom	Java syntax
   repeat until sentinel	while loop	while(___) { ... }
   do n times	C-style for loop	for(___; ___; ___) { ... }
   for each element	for-each loop	for(___ : ___) { ... }

   In what situations would you want to use each one of these?

Your response

What was particularly interesting, confusing, or exciting to you in this reading?