C Programming on the IBM PC (C Programmers Reference Guide Series)

do

The do loop is one of three loop constructs available in C++. The general form of the do loop is

do {     statement block } while(condition);

If only one statement is repeated, the braces are not necessary, but they add clarity to the statement.

The do loop is the only loop in C/C++ that will always have at least one iteration because the condition is tested at the bottom of the loop.