In a do-while loop, the condition is checked after the loop body has been executed, making this type of loop unique. This behavior ensures that the loop body will always execute at least once. After each iteration, the condition is evaluated, and if the condition is true, the loop will execute again. If the condition is false, the loop will terminate. This control structure is useful in cases where you want to guarantee that the loop executes at least once, regardless of the initial state of the condition.