1.5 break/continue

1.break满足某个条件中断（跳出）循环

<script>
        for(var i=0;i<=4;i++){
            if(i==2){
                break;
            }
            console.log(i)
        }
    </script>

2.continue跳过某个条件，继续循环

<script>
        for(var i=0;i<=5;i++){
            if(i==2){
                continue;
            }
            console.log(i)
        }
    </script>