date: 2024-04-14
title: Web/Javascript/Quick-Start
status: DONE
author:
  - AllenYGY
tags:
  - Javascript
  - Program
  - NOTE
created: 2024-04-14T00:21
updated: 2024-05-12T23:14
publish: True

Web/Javascript/Quick-Start

2024-11-05 1
手机查看

引入Js

<script> 
</script>

输出

弹窗alert()
打印console.log()

数据类型

1. Number

• JavaScript中不区分小数和整数
• -99 //负数99
• NaN   //not a number
• Infinity  //表示无限大

2. String

• ‘ABC’
• “ABC”

3. Boolean value

• True、false

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