LECTURE
OCTOBER 13 2004

ASSIGNMENTS
- Fri 10/15 CodeLab 6
- Mon 10/18 Assignment 2

MORE TYPES OF LOOPS

What?
- *pretest loop*
- loop body executed 0 or more times
How?
- while loop

What?
- *posttest loop*
- loop body exected 1 or more times
How?
- do-while loop

DO-WHILE LOOP

What?
- syntax
How?
- do

      <statement>

  while ( <boolean expression> );

What?
- <statement>
How?
- one or more statements (multiple require brackets)
- executed until <boolean expression> is false

What?
- control-flow diagram
How?
- arrow into preceding code block rectangle
- arrow into loop body rectangle
- arrow into loop condition diamond
- false arrow
- true arrow to above loop body rectangle

What?
- good style
How?
- don't duplicate the loop test inside the loop
- use a boolean to represent repeated conditions (especially if any of multiple)

What?
- while versus do-while
- while generally more frequently used