Lesson 17: while loop

Sometimes you want to repeat an action several times. while (condition) { ... } runs the block again and again as long as the condition is true. You need a counter (like int i) that changes inside the loop — otherwise the condition never becomes false and the loop runs forever. i++ adds 1 to i.

while is like repeating 'as long as I haven't arrived — take another step'. Without advancing the counter, you're stuck forever.

while (condition): Repeats the block as long as the condition is true.
counter: A variable (like i) that tracks how many times we've looped and changes each round.
i++: Adds 1 to i. Shorthand for i = i + 1.
infinite loop: If the condition never becomes false (e.g. you forget i++), the loop never stops.