While Loop

The while Loop

Use a while loop when you don't know how many iterations you need — you just keep going while a condition stays true.

int number = 1;

while (number <= 5) {
  cout << number << "\n";
  number++;
}

while vs for

Reach for for when you have a known count or are iterating over a range. Use while when the stopping condition depends on something that changes inside the loop, like reading input or waiting for a flag.

Both can do the same job, but choosing the right one makes your intention clear.