我的 javscript 计算有问题

Question

I am trying to add a the values in an array untill the sum is 1000. I have been trying it using for loop with if condition. but it doesn't stop in according with sum value. example array [110.110.225,130,150,100,240,170,100,110,...] I want the loop to be stopped once the sum of values = 1000 or any other specific sum. Need help please.

Answer 1

can we see an example of your code?

you can use a for loop to check for the sum and exist the loop using break if the sum reaches above your desired value.

this will notify about how many numbers were needed to reach 1000 and exist the loop:

for (var i = 0; i < numbers.length ; i++) {

var sum = 0;
sum += numbers[i];

if (sum > 1000) {
  alert(i);
  break;
  }

}

Answer 2

function stopWhenSumEqualsN(n,A) {
  var n=n||500;
  var A=A||[110,110,225,130,150,100,240,170,100,110];
  let obj=A.reduce(function(a,v,i){
    if(a.sum<a.threshold) {
      a.sum+=Number(v);
      a.maxidx+=Number(1);
    }
    return a;
  },{sum:0,maxidx:0,threshold:n});
  let msg=Utilities.formatString('sum: %s maxidx: %s threshold: %s',obj.sum,obj.maxidx,obj.threshold);
  msg+='<br /><input type="text" id="nin" value="' + n + '" /> n<br />';
  msg+='<textarea id="Ain" rows="4" cols="60">' + A.join(",") +  '</textarea>A<br /><input type="button" value="Execute" onclick="runAgain();" />';
  msg+='<input type="button" value="Start Again From Scratch" onClick="google.script.run.stopWhenSumEqualsN();" />';
  msg+='<script>function runAgain(){let n=document.getElementById("nin").value;let A=document.getElementById("Ain").value.split(",");google.script.run.stopWhenSumEqualsN(n,A);}</script>'; 
  SpreadsheetApp.getUi().showModelessDialog(HtmlService.createHtmlOutput(msg), "Results");
}