-- card: 51117 from stack: in
-- bmap block id: 0
-- flags: 0000
-- background id: 4755
-- name: 


-- part contents for background part 4
----- text -----
    while (c = getchar() , c != 'x')
        process_input(c);

The alternative 'do-while' statement evaluates the expression after having executed the statement once:

    do
        statement
        while (expression);

(Note the trailing semicolon.)  Though used less frequently than 'while' or 'for' loops, there are occasional situations where do-while affords simplified code.

-- part contents for background part 7
----- text -----
162