javascript 如何解析数组的值以求和

Question

如何解析数组中的数字以将它们相加。我应该在哪里添加 parseInt ？所以我可以将数组求和值除以数组的 .length 值。是在首先声明数组的地方还是在求和的函数中完成？它对我不起作用

<script>
    var studentArr = new Array();
    var scoreArr = new Array();

    function enter() {

        var studentName = document.getElementById("inp").value;
        studentArr.push(studentName);

        var stuval = "";

        for(i=0; i < studentArr.length; i++)
        {
            stuval = stuval + studentArr[i] + "<br/>";
        }

        document.getElementById("iop").innerHTML = stuval;

        var studentScore = document.getElementById("inps").value;
        scoreArr.push(studentScore);

        var scoreval = "";

        for(i=0; i < scoreArr.length; i++)
        {
            scoreval = scoreval + scoreArr[i] + "<br/>";
        }



    }

    function summ() {

        var grade;
        var average;
        var sum = parseInt(scoreArr.valueOf());

        if (scoreArr.valueOf() == 70) {

                grade = "C";
                document.getElementById("opo").innerHTML = grade;
        }

        if (scoreArr.valueOf() == 80) {

                grade = "B";
                document.getElementById("opo").innerHTML = grade;
        }

        if (scoreArr.valueOf() == 90) {

                grade = "A";
                document.getElementById("opo").innerHTML = grade;
        }

        scoreArr.sort(function(a, b){return b-a});
        document.getElementById("hop").innerHTML = "Max Score is: <br>" + scoreArr[0];

        scoreArr.sort(function(a, b){return a-b});
        document.getElementById("lop").innerHTML = "Min Score is: <br>" + scoreArr[0];

        average = sum / scoreArr.length;
        document.getElementById("aop").innerHTML = average;

    }

</script>

Answer 1

像这样:

sum=0;
for (i=1; i<randomArray.length; i++){
    sum += parseInt(randomArray[i]);
}
result = sum / randomArray.length;