Primitive java - Data Structures and Problem Solving Using Java - page 16

Notice that the do statement includes a semicolon. A typical use of the do
statement is shown in the following pseudocode fragment:

do
{
Prompt user;
Read value;
} while( value is no good );

The do statement is by far the least frequently used of the three looping
constructs. However, when we have to do something at least once, and for
some reason a for loop is inappropriate, then the do statement is the method of
choice.

1.5.7 break and continue

The for and while statements provide for termination before the start of a
repeated statement. The do statement allows termination after execution of a
repeated statement. Occasionally, we would like to terminate execution in the
middle of a repeated (compound) statement. The break statement, which is
the keyword break followed by a semicolon, can be used to achieve this.
Typically, an if statement would precede the break , as in

while( ... )
{
...
if( something )
break;

...
}

The break statement exits the innermost loop only (it is also used in conjunc-
tion with the switch statement, described in the next section). If there are several
loops that need exiting, the break will not work, and most likely you have poorly
designed code. Even so, Java provides a labeled break statement. In the labeled
break statement, a loop is labeled, and then a break statement can be applied to the
loop, regardless of how many other loops are nested. Here is an example:

The break state-
ment exits the
innermost loop or
switch statement.
The labeled break
statement exits
from a nested loop.

outer:
while( ... )
{
while( ... )
if( disaster )
break outer; // Go to after outer

}
// Control passes here after outer loop is exited