获取数字数组总和的函数

Question

Javascript

I'm getting 00.10.10.20.20.050.050.05 as my output. However, I want the sum which should be .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

Actually you are concatenating strings (your array has strings on it). Just parse your strings:

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);