# 🏅 Day 02 - 型別與宣告

### 題目

以下兩題請合併為一份 CodePen 繳交，並透過「註解」進行回答。

問題一
---
以下變數 a, b, c, d, e, f 它們的值、型別各自為何? (請先想想看，不要用 console.log 檢查)

let a = "10" + "10";
let b = "10" * "10";
let c = 10 + "10";
let d = 10 * "10";
let e = 10 - "2";
let f = "10" - "2";

範例回答格式：

// 問題一：
// a = 值, 型別
// b = 值, 型別

問題二
---
請問以下題項哪些是有問題的，並說明為什麼。

// 1
let myName = "jay";

// 2
var _state = true;

// 3
let true = true;

// 4
const 520Pretty = 520;

// 5
const appleNum = 10;
appleNum = 2;

// 6
var ming ='小明';
var ming = '小民';

// 7
const ming = '小明'; 
const ming = '小民'; 

// 8
let ming = '小明';
let ming = '小民'; 

// 9
let ming = '小明';
ming = '小民';

// 10
let $open = "芝麻開門';

範例回答格式：

// 問題二
// (2)，因為 blablabla 
// (3)，因為 balabababa 

## 回報流程

將答案寫在 CodePen 並複製 CodePen 連結貼至底下回報就算完成了喔!
解答位置請參考下圖（需打開程式碼的部分觀看）


<!-- 解答：

問題一：
a = "1010"，string
b = 100，number
c = "1010"，string
d = 100，number
e = 8，number
f = 8，number

問題二：
(3)，關鍵字不可以用來作為變數名稱
(4)，變數名稱的開頭不可以使用數字
(5)，const 不可以重新被指派值
(7)，因為 const 不可重複宣告，會呈現 Uncaught SyntaxError
(8)，因為 let 不可重複宣告，會呈現 Uncaught SyntaxError
(10)，"芝麻開門' 的引號必須成對

-->

回報區
---
| # | Discord | CodePen / 答案 |
|-----|---------|---------------|
| 1 | 偉青(.weiching_721) | [Codepen](https://codepen.io/lovegull/pen/YPKYEKp?editors=0010) |
| 2 | 馬德(qwerasd718) | [Codepen](https://codepen.io/maywang/pen/PwYEOQa?editors=0010) |
| 3 | ss585801. | [Codepen](https://codepen.io/ss585801/pen/qEWppEV?editors=0012) |
| 4 | HarryKuo | [Codepen](https://codepen.io/harry_kuo/pen/ZYzvvBB?editors=0011) |
| 5 | Tau | [Codepen](https://codepen.io/Tau-Hsu/pen/ogvppxq?editors=1112) |
| 6 | yutzu | [Codepen](https://codepen.io/dtafsrmf-the-lessful/pen/MYgrrye?editors=0010) |
| 7 | Ali | [Codepen](https://codepen.io/Alicia1117/pen/YPKYYvB) |
| 8 | 柴郡貓(bian_yang_mofa) | [Codepen](https://codepen.io/cssf998811/pen/QwLaQLp?editors=0010) |
| 9 | Wayne_957 | [Codepen](https://codepen.io/Wayne957/pen/EaYooBR)
| 10 | hsiang4100 | [Codepen](https://codepen.io/vvnrbgxl-the-typescripter/pen/KwPZQBR?editors=0011) |
| 11 | adengg | [Codepen](https://codepen.io/Osases/pen/KwPZQJB?editors=0010) |
| 12 | ZoeKang | [CodePen](https://codepen.io/byehywmx-the-animator/pen/mybpXzO?editors=0011) |
| 13 | CC(tofuuu_cat) | [CodePen](https://codepen.io/CC-cat/pen/ogvpqjL?editors=0010) |
| 14 | poyi | [CodePen](https://codepen.io/poyi-the-flexboxer/pen/ogvpEGv?editors=0012) |
| 14 | Benson | [CodePen](https://codepen.io/DevilButler/pen/KwPZoRL) |
| 15 | 不好說 | [Codepen](https://codepen.io/zarr12steven/pen/wBwpmKm?editors=0012) |
| 16 | mu mu | [Codepen](https://codepen.io/ishuki916/pen/yyBpKmN) |
| 17 | Arsian Kuo | [Codepen](https://codepen.io/Arsian-Kuo/pen/mybpLxg) |
| 18 | ally_tsao | [Codepen](https://codepen.io/ggnhmrxv-the-scripter/pen/PwYEazN?editors=0010)|
| 19 | Tammy | [Codepen](https://codepen.io/Tammy_Tsai/pen/LEPerJY) |
| 20 | Nora | [Codepen](https://codepen.io/ehguhcmy-the-reactor/pen/gbYojaG) |
| 21 | JC | [Codepen](https://codepen.io/lifetimingwhisper/pen/bNbajVM) |
| 22 | Sui | [Codepen](https://codepen.io/suihsilan/pen/KwPZBxj?editors=0010) |
|23|Lee | [Codepen](https://codepen.io/leemo-tseng/pen/raBpKoP)
| 24 | Jayhsu | [Codepen](https://codepen.io/Jay-Hsu-the-bold/pen/GgKyXzV?editors=1111) |
| 25 | ya_meow | [Codepen](https://codepen.io/gkfxzvcb-the-bashful/pen/emOyLEv?editors=0010)|
| 26 | helena | [Codepen](https://codepen.io/helena27/pen/pvzazbr)|
| 27 | JerryOOO | [Codepen](https://codepen.io/fatiangel/pen/QwLaQOO?editors=0011)|
| 28 | jameschen5522 | [Codepen](https://codepen.io/frswsqve-the-selector/pen/JoPpXYm?editors=0011)|
| 29 | 0111mina | [Codepen](https://codepen.io/0111mina/pen/KwPQMNG?editors=0012)|
| 30 | penny_5754 | [Codepen](https://codepen.io/bmxbpggh-the-flexboxer/pen/qEWqNxN)|
| 31 | xuanchen0610 | [Codepen](https://codepen.io/YiXuan-Chen-the-vuer/pen/ByBYLQb)|
| 32 | JanllyGuo | [Codepen](https://codepen.io/kedugaw/pen/mybXrdK)|
| 33 | shiang |[Codepen](https://codepen.io/shiang29/pen/raBJaMW?editors=0010)|
| 34| daffytseng |[Codepen](https://codepen.io/Daffy-Tseng/pen/azoqwem) |
| 35| chun0075 |[Codepen](https://codepen.io/Lin-Angela/pen/JoPpRwv?editors=0011) |
| 36| Li Wei-Nin |[Codepen](https://codepen.io/leewayne/pen/dPbdzvd) |
|37|----這條線以下都麻糬----|[Codepen](https://codepen.io/tsfaydhk-the-selector/pen/qEWxMvY?editors=0012)|
|38|地呱|[Codepen](https://codepen.io/pen/?editors=1111)|
|39|weins_jo3jo3|[Codepen](https://codepen.io/Shao-the-selector/pen/jENYvQM?editors=0011)|
|40|will092317|[Codepen](https://codepen.io/xuazoblx-the-flexboxer/pen/xbKYPxv)|
|41|pja._.|[Codepen](https://codepen.io/PJA0103/pen/RNbMgGR?editors=0010)|
|42|Rylee|[Codepen](https://codepen.io/ryleezheng/pen/azoGwag)|
|43|641|[Codepen](https://codepen.io/Liu641/pen/emOrRQx?editors=0011)|
|44| Cami | [Codepen](https://codepen.io/irisLife/pen/pvzVWZR) |
|45|hsin yu| [Codepen](https://codepen.io/tina2793778/pen/gbYKoPW?editors=0010)|
|46|wuyuli_21403| [Codepen](https://codepen.io/Job-Wilhelm/pen/OPLZqgR)|
|47|gagalala| [Codepen](https://codepen.io/nohungry/pen/azoxmEm?editors=1111)|
| 48 | Cami | [Codepen](https://codepen.io/irisLife/pen/EaxgroP) |

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