【JS】For语句练习
练习一：
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>d24c04429 欧永鸿</title>
</head>
<body>
<script>
var sum = 0;
var count = 0;
for (var i = 1; i <= 100; i++) {
sum += i;
count++;
}
var avg = sum / count;
console.log(avg);
</script>
</body>
</html>练习二：
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>d24c04429 欧永鸿</title>
</head>
<body>
<script>
var jisum = 0;
var ousum = 0;
for (var i = 1; i <= 100; i++) {
if (i % 2 == 0) {
ousum += i;
} else {
jisum += i;
}
}
console.log("1到100之间所有偶数的和是: " + ousum);
console.log("1到100之间所有奇数的和是: " + jisum);
</script>
</body>
</html>练习三：
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>d24c04429 欧永鸿</title>
</head>
<body>
<script>
var sum = 0;
for (var i = 1; i <= 100; i++) {
if (i % 3 == 0) {
sum += i;
}
}
console.log("1到100之间能被3整除的数字和是: " + sum);
</script>
</body>
</html>
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