明道云获取多条记录中的数值字段求和

var zhi1 = input.NUM;
//去掉所有双引号 结果变成[12,22,23]这样
var zhi2 = zhi1.replace(/\"/g,''); 
var zhi3 = zhi2.replace(/\[/g,'');
var zhi4 = zhi3.replace(/\]/g,'');        
var arr = zhi4.split(',') 
 
let sum = 0;
for(let i = 0; i < arr.length; i++){
      sum += arr[i]*1;
}
output = {output: sum.toFixed(0)};