<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<script>
var i = 0;
var sum = 0;
if(i <= 100){
if(i % 2 == 0){
sum += i;
}
i++;
}
alert(sum);
</script>
</head>
<body>
</body>
</html>
为什么上述代码是错的?
为什么第一个if必须换成while才正确?