题解 | #计数器#

 <script type="text/javascript">

        const closure = () => {
            // 补全代码
            let i = 1

            return () =>  i++ 
        }
        const re1 = closure()

        console.log(re1());
        console.log(re1());
        console.log(re1());
        console.log(re1());
      
    </script>

<script type="text/javascript">      
     function out() {
            let count = 0
            function fn() {
                count++
                console.log(`函数被调用${count}次`)
            }
            
            return fn
        }

        const re = out()
        re()
        re()
        re()
    </script>