CSS又上完了,真是快!!!
预习了JS的一部分,写了几条简单的JS代码:
1.成绩判定:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>学生成绩评定</title>
<script type="text/javascript">
var a = window.prompt("朋友,请输入你的成绩:");
if (a==null){
document.write("拜拜");
}else if (a>100) {
document.write("还能愉快的玩耍嘛!!!");
}else if(a>90) {
document.write(a+"是优秀");
}else if (a>=80) {
document.write(a+"是良好");
}else if (a>=70) {
document.write(a+"是中等");
}else if (a>=60) {
document.write(a+"是及格");
}else if (a<60 && a>=0) {
document.write(a+"是不及格");
}else{
document.write("一脸懵逼");
}
</script>
</head>
<body>
</body>
</html>
2.判断平年还是闰年:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>平年还是闰年?</title>
<script type="text/javascript">
var a = window.prompt("请输入年份");
if (a==null) {
document.write("玩我呢?");
}else if(a==0){
document.write("你什么时候听说过0年?");
}else{
a%4==0 && a%100!=0 || a%400==0?document.write(a+"年是闰年"):document.write(a+"年是平年");
}
</script>
</head>
<body>
</body>
</html>
3.输出1-100内的奇数:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>while</title>
<script type="text/javascript">
var i=1;
while (i<=100)
{
if (i%2!=0)
{
document.write(i+‘<br>‘);
}
i++;
}
</script>
</head>
<body>
</body>
</html>
时间： 2025-01-01 21:29:27