认识循环

![image.png](https://p9-juejin.byteimg.com/tos-cn-i-k3u1fbpfcp/f139107ba2b446c4b4c11d8c1c5176cf~tplv-k3u1fbpfcp-watermark.image?)

• while循环

• do..while循环

• for(;;)循环

循环控制