题解 | #数组求和#
数组求和
http://www.nowcoder.com/practice/cc3ce199461c4c4cb8f63db61d7eba30
{"css":"","js":"function sum(arr) {\n var sum=0;\n for(var i=0;i<arr.length;i++){\n sum=sum+arr[i];\n }\n return sum;\n}","html":"","libs":[]}
声明一个变量,然后用一个for循环将数组的元素相加即可