JS入门到精通 第2章 JavaScript基础
导读:一、练习1 1. 源代码<!doctype html> <html> <head> <meta charset="utf-8"> <title>输出红、绿、蓝3种颜色的值</title> </head> &l...
一、练习1
1. 源代码
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>输出红、绿、蓝3种颜色的值</title>
</head>
<body>
<script type="text/javascript">
document.write("RGB颜色#6699FF的3种颜色的色值分别为:");
document.write("<p>R:"+0x66);
document.write("<p>G:"+0x99);
document.write("<p>B:"+0xff);
</script>
</body>
</html>2. 运行页面
https://www.xinyizhishu.top/jsC/sc/2_1/
二、练习2
1. 源代码
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>输出科学记数法表示的浮点数</title>
</head>
<body>
<script type="text/javascript">
document.write("科学记数法表示的浮点数的输出结果:");
document.write("<p>");
document.write(3e+6);
document.write("<br>");
document.write(3.5e3);
document.write("<br>");
document.write(1.236e-2);
</script>
</body>
</html>2. 运行页面
https://www.xinyizhishu.top/jsC/sc/2_2/
三、练习3
1. 源代码
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>输出奥尼尔的中文名、英文名和别名</title>
<style type="text/css">
*{font-size:18px;}
</style>
</head>
<body>
<script type="text/javascript">
document.write('<pre>');
document.write('中文名:沙奎尔·奥尼尔');
document.write('\n英文名:ShaquilleO\'Neal');
document.write('\n别名:大鲨鱼');
document.write('</pre>');
</script>
</body>
</html>2. 运行页面
https://www.xinyizhishu.top/jsC/sc/2_3/
四、练习4
1. 源代码
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>输出球员信息</title>
<style type="text/css">
*{font-size:18px;
line-height:30px;}
</style>
</head>
<body>
<h1 style="font-size:24px;">科比·布莱恩特</h1>
<script type="text/javascript">
var alias="小飞侠";
var height=198;
var score=33643;
var achievement="五届NBA总冠军";
var position="得分后卫/小前锋";
document.write("别名");
document.write(alias);
document.write("<br>身高:");
document.write(height);
document.write("厘米<br>总得分:");
document.write("score");
document.write("分<br>主要成就:");
document.write("achievement");
document.write("<br>场上位置:");
document.write(position);
</script>
</body>
</html>2. 运行页面
https://www.xinyizhishu.top/jsC/sc/2_4/