<Js>数据类型
2016-05-20 17:09
543 查看
//Number:数字 var num = new Number(1.568); document.write("num = "+num+"<br>"); var num1 = 20.1; document.write("num1 = "+num1+"<br>"); //清空 num1 = null; document.write("num1 = "+num1+"<br>"); //无value var num2; document.write("num2 = "+num2+"<br><br>");
//String:字符 var str = new String("ABC"); document.write("str = "+str+"<br>"); var str1 = 'asd'; document.write("str1 = "+str1+"<br><br>");
//Array:数组 var arr = new Array("a",'d',1); document.write("arr = "+arr+"<br>"); var arr1 = ["a",'d',1]; document.write("arr1 = "+arr1+"<br>"); arr1[0] = "dd"; arr1[1] = '12'; document.write("arr1,arr1 = "+arr1[0]+","+arr1[1]+"<br><br>");
//Boolean:布尔 var bool = true; document.write("bool = "+bool+"<br>"); bool = false; document.write("bool = "+bool+"<br><br>");
//Object:类 var obj = { df:"df", sss:'12', ff:[1,'3',true] } document.write(obj["df"]+"<br>"); document.write(obj.sss);
相关文章推荐
- js抛物线
- Web前端程序员推荐7个实用的JavaScript工具
- js判断单选按钮是否被选中
- NW.js & Electron Compared (2016 Edition)
- 详解JavaScript中的事件流和事件处理程序
- json一些特点
- js跨域请求
- js简单分页,可用
- JavaScript中的Object对象学习教程
- chart.js 入门&&highcharts 入门(推荐使用highcharts)
- Js中动态创建Json,动态为Json添加属性、属性值
- NW.js and Electron compared
- Javascript(JS)对Cookie的读取、删除、写入操作帮助方法
- jsp中文乱码问题
- 【转】js写显示农历的日期
- javascript进行数组追加方法小结
- JSP页面固定页面为绝对路径
- JSON的哲学思维
- layer.js 贤心制作的弹出层插件-不仅仅是弹层
- JS笔记