Java™ How To Program (Early Objects), Tenth Edition

Braces in a do...while Repetition Statement

It isn’t necessary to use braces in the do...while repetition statement if there’s only one statement in the body. However, many programmers include the braces, to avoid confusion between the while and do...while statements. For example,

while (condition)

is normally the first line of a while statement. A do...while statement with no braces around a single-statement body appears as:

do   statementwhile (condition);

which can be confusing. A reader may misinterpret the last line—while(condition);—as a while statement containing an empty statement (the semicolon by itself). Thus, the do...while statement with one body statement is usually written with braces as follows:

do{   statement} while ( ...