Lab: looping until a condition changes

A while loop repeats for as long as a condition stays true. Use it when you cannot say in advance how many turns you need.

The task

Start with a small number and double it until it passes a target, printing each step.

int value = 1;
int target = 50;

while (value < target)
{
    outputLabel.Text += value + " ";
    value = value * 2;
}

The one mistake to avoid

Something inside the loop must change the condition. If nothing does, the condition stays true forever and the page never finishes loading. That is the classic infinite loop.

You now have decisions and repeats. The next useful step is storing many values, which begins with storing many values.