Java Video 14: While Loop

In this video you will learn how to create and use java while loop.
A while loop does not necessarily iterate a specified number of times. Rather, as long as its control expression is true, a while loop will continue to iterate. This type of loop is very useful in situations where a for loop would be ineffective, particularly when the user is given the opportunity to interact with the program.
A while loop is considered to be an indeterminate or indefinite loop because usually only at run-time can it be determined how many times it will iterate.
A while loop is also considered to be a top-checking (or pretest) loop, since the control expression is located on the first line of code with the while keyword. That is, if the control expression initially evaluates to FALSE, the loop will not iterate even once.
After the keyword, while, a control expression is necessary.
while (control expression)
{
one or more statements
}
The control expression must evaluate to TRUE in order for the while loop to iterate.
Like if statements and other kinds of loops, the curly braces are not required with a while loop if there is only statement in the body of the loop. However, it is good style to always use curly braces.
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