将其转换为while循环的最佳方法是什么？
<html>
<head>
<script type="text/javascript">
<!--
function GetGrades() {
var grades = [];
var grade;
var sum = 0;
for(i=0; i<5; i++) {
grade = prompt("Enter Homework " + (i+1) + " grade: ");
grades.push(Number(grade));
}
for(i=0; i<5; i++) {
document.write("Homework " + (i+1) + " grade: " + grades[i] + "</br>");
sum = sum + grades[i];
}
var avg = sum/5.0;
document.write("</br>Grade: " + avg + "</br>");
}
//-->
</script>
</head>
<body onload="GetGrades()">
</body>
</html>
我曾无知地试图简单地将变量I声明为sero，并将其更改为while。
PD_3