while vs do-while, break vs continue

Model answer.

• `while (cond) { ... }` checks the condition first, so the body may run zero times.
• `do { ... } while (cond)` runs the body once before checking, so it always runs at least once. Useful for "ask until valid" input loops.

let tries = 0;
do { tries++; } while (tries < 0);   // body still ran once: tries = 1

• `break` leaves the loop immediately.
• `continue` skips the rest of the current iteration and moves to the next check.

for (const n of [1, 2, 3, 4, 5]) {
  if (n === 2) continue;   // skip 2
  if (n === 4) break;      // stop at 4
  console.log(n);          // prints 1, 3
}

With nested loops, a label lets break outer; exit both loops at once.