rp_firstcommit.js

// 命令形
var total = 0,
    num = 0,
    ave,
    i;
 
for (i = 1; i <= 10; i++) {
  total += i;
  num++;
}
ave = total / num; console.log(ave); // 5.5
 
// 宣言型
var add = function(a, b) {
  return a + b;
};
var average = function(array) {
  return array.reduce(add) / array.length;
};
var numbers = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
var ave = average(numbers);
console.log(ave); // 5.5