created: 12/12/99; revised: 01/22/00, 07/20/02, 05/27/03, 01/29/06, 01/17/09, 08/06/14, 07/29/2017
created: 12/12/99; revised: 01/22/00, 07/20/02, 05/27/03, 01/29/06, 01/17/09, 08/06/14, 07/29/2017
do Statement
Loops are so important, and are so common in programs,
that there are several Java language features
for implementing them.
You have already seen while loops
and for loops.
This chapter looks at do loops.
A programming language needs to have
only one general looping method.
The while statement can be used to implement any type of loop.
However,
as we have seen,
the for statement often is
convenient, and also can be used to implement any type of loop.
The do loop is occasionally convenient and can be used to implement any of the three types of loops.
However, of the three looping statements, it is used the least.
Some programmers prefer not to use it at all.
The do statement is not part
of the AP (Advanced Placement)
computer science test given to
high school students in the US.
It is not used in the chapters that
follow this one.
do statementThere are several looping statements in Java, although only one (any one of them) is logically necessary.