Iteration

4.1 while Loops Basic while Loops while Loop Countdown Infinite Loops while Loop Applications while Loop Countdown Get Down to One Running Average Check Your Understanding Exercise: Guess the Number
4.2 for Loops Breaking Down the for Loop Putting It All Together for Loop Countdown Count By Twos Off By One Errors For Loop Sum Check Your Understanding Exercise: Replace while Loop with for Loop
4.3 Developing Algorithms Using Strings Traversing a String Determining Properties of a Substring Reverse String Replace Characters Check Your Understanding Exercise: Password Checker
4.4 Nested Iteration Nested for Loops Nested while Loops Make a Rectangle Nested Loop Iteration Counts Inverted Triangle Check Your Understanding Exercise: Addition Table
4.5 Informal Code Analysis Algorithms Program Efficiency Statement Execution Count Loop Execution Count while Loop Time for Loop Time Check Your Understanding Exercise: Improving findChar Speed