Returns the average value of a list of numbers.

Use Iterable.reduce() to get the sum of all the numbers in a list, divide by Iterable.length to get the average.

代码实现

num average(List<num> nums){
  return nums.reduce((num a, num b) => a + b) / nums.length;
}

使用样例

average([1, 2, 3, 4]); // 2.5