Question

JavaScript

我得到00.10.10.20.20.050.050.05作为输出。但是，我希望总和为.75

var array = ['0.1','0.1','0.2','0.2','0.05','0.05','0.05']
var sum = 0;
function sumArray() {
    var random = Math.floor(Math.random() * 100);
    for (i=0; i < array.length ; i++) {
      sum +=array[i];
    }

}
sumArray();
alert(sum);

Answer 1

实际上，您是在串联字符串（您的数组上有字符串）。只需解析您的字符串即可：

var array = ['0.1','0.1','0.2','0.2','0.05','0.05','0.05']
var sum = 0;
function sumArray() {
    var random = Math.floor(Math.random() * 100);
    for (i=0; i < array.length ; i++) {
      sum += parseFloat(array[i]);
    }

}
sumArray();
alert(sum);

Answer 2

let array = ['0.1','0.1','0.2','0.2','0.05','0.05','0.05'];
let sum = array.reduce((a, b) => parseFloat(a) + parseFloat(b));
console.log(sum);

获取数字数组总和的函数

2 个答案: