7 Looping

Most Important Concepts / Code

while loops are condition controlled.

for loops are count controlled.

Use a while loop when you don't know how many times it will have to repeat, like a user entering bad input.

There must always be something inside the loop that changes the loop condition. If not, you get an infinite loop.

The name for a variable that keeps a running total is an accumulator, i.e. runningTotal += anotherNumber

The name for one loop execution is an iteration.

Sentinel - special value to stop loop

for (initialization; termination; increment) {

// ...

}

int continueProgram = 1;

while (continueProgram == 1) {

// your program

System.out.println("Press 1 to continue or 2 to quit.");

continueProgram = keyboard.nextInt();

}