# 🏅 DAY2 每日任務
###### tags: `JS 直播班 - 2021 秋季班`

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";

請依照以下格式回答

>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 thread 中回報就算完成了喔! 解答請參考下圖（需打開程式碼的部分觀看）


<!-- 問題一 解答
a = "1010"，string
b = 100，number
c = "1010"，string
d = 100，number
e = 8，number
f = 8，number
-->

<!-- 問題二 解答
(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' 的分號必須成對
-->

| slackName | codePen 連結 |
|:---------:|:------------:|
| 威廉姆 | https://codepen.io/CodingTrain_1/pen/yLoYOpy |
| sheng wei | https://codepen.io/sheng-wei12/pen/BadyezM |
| Iris Huang | https://codepen.io/ythuang/pen/MWvYExo |
| 陳sam | https://codepen.io/euldpliv/pen/NWvPaVN |
| 喜美 | https://codepen.io/Candace802/pen/dyzPZyr |
| POPEYE | https://codepen.io/popeye_ux/pen/XWaJeOV |
| Aaron Tu | https://codepen.io/aarontu/pen/NWvPaOG |
| 彣ㄨㄣˊ | https://hackmd.io/Er4R-j-ASgeDNAoLUhD2pA |
| 咖咖 | https://codepen.io/PlayFunCa/pen/YzxPEXo?editors=0011 |
| Tim Lin | https://codepen.io/TimmyLin/pen/rNzaYVd |
| Genos | https://codepen.io/pb220416/pen/RwZNjwX |
| jojoy | https://codepen.io/jojoy/pen/LYjEOPM?editors=0010 |
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| CloThEs | https://codepen.io/bogwdnxx-the-sans/pen/GRvgONJ |
| Karen Huang | https://codepen.io/Coding_Snorlax/pen/LYjEObv |
| 群嘉 | https://codepen.io/efzdamnp-the-lessful/pen/MWvYOJQ?editors=0010 |
| 米米 | https://codepen.io/Jameshsu0407/pen/PoKwOwq?editors=0011 |
| lumei | https://codepen.io/l_umei/pen/jOLEamL?editors=0010 |
| 凱文 | https://codepen.io/KevinHaHa/pen/jOLEawG |
| Cheng Pei-hsuan | https://codepen.io/PaCheng/pen/wvqBPJo |
| Jun Ting Lin | https://codepen.io/jake1155/pen/KKvwyzq |
| YuriT | https://codepen.io/wenfisht/pen/MWvYOEG?editors=0010 |
| Kelvin Hsu | https://codepen.io/kelvin001/pen/qBXEVpG?editors=1010 |
| Arista | https://codepen.io/arista-hsieh/pen/GRvgOQZ?editors=1010 |
| Andy Huang | https://codepen.io/HsuHuaHuang/pen/BadymYp |
| kevinhes | https://codepen.io/kevinhes/pen/JjyoOOV?editors=0011 |
| 林小君 | https://codepen.io/hcvbcjqq-the-vuer/pen/MWvYOLP |
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| Jessie | https://codepen.io/jssanji03/pen/VwzYraJ?editors=1010 |
| Sunny | https://codepen.io/shihchinghuang/pen/KKvwyLe |
| Sharon Chang | https://codepen.io/npxuxgef/pen/porvdOV |
| Bonnie | https://codepen.io/bonnieli1414/pen/ExvaoKY |
| Joy Cheng | https://codepen.io/joycheng5432/pen/WNEbdez?editors=0011 |
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| Cadiis | https://codepen.io/candiyen/pen/dyzPJOp |
| Lai | https://codepen.io/co_lai/pen/KKvwZyE |
| Ka | https://codepen.io/potatokaka/pen/RwZNxoV |
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| Peter Chen | https://codepen.io/yuckugjy-the-sasster/pen/RwZNxyj |
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| Sylvia-H | https://codepen.io/Cosmosheart/pen/zYdxRgW?editors=0011 |
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| Shiny | https://codepen.io/shinychen/pen/ZEJYvag |
| Anna | https://codepen.io/kycrleao/pen/MWvYVpQ?editors=0011 |
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| Booker | https://codepen.io/bookbasketball/pen/YzxPvNv |
| IvyHe | https://codepen.io/j06ivy/pen/vYJErXa?editors=0010 |
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| Ellen Chen | https://codepen.io/ellenchialin/pen/oNeXLoO | | |
| Alvin | https://codepen.io/Alvin20201116/pen/wvqazBq | | |
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| 劉毓哲 | https://codepen.io/JERO0729/pen/zYdGNOp?editors=0010 | | |
| Irene Wang | https://codepen.io/irene-wang-the-looper/pen/RwZPKaz | | |
| 傑瑞 | https://codepen.io/auatwood909815/pen/gOxpLzq?editors=0012 | | |
| Bob_Lai | https://codepen.io/yameday/pen/WNEvRqX | | |
| Jie Du | https://codepen.io/qgqonost-the-flexboxer/pen/PoKqWOZ?editors=0010 | | |
| 許閔翔 | https://codepen.io/oupbzfxq-the-scripter/pen/RwZPpOj | | |
| Meng | https://codepen.io/MGHN/pen/jOLPBzQ?editors=0012 | | |
| Kin Hei Shing | https://codepen.io/kinhei-shing/pen/bGrdrqL?editors=0012 | | |
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| Yvonne | https://codepen.io/Evonne/pen/gOxpoYL?editors=1010 | | |
| Louis | https://codepen.io/Louis164156/pen/PoKqRMb | | |
| Eva Lo | https://codepen.io/hsiaoi/pen/GRvJdNr?editors=0011 | | |
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| 肉魚 | https://codepen.io/zoechen13/pen/wvqaEbx?editors=0010 | | |
| Ching | https://codepen.io/Jaimedede/pen/KKvpjEX | | |
| 陳品宏 | https://codepen.io/wtka/pen/porjbVw | | |
| 大衛 | https://codepen.io/exnsrpjc/pen/GRvpZKO?editors=0010 | | |
| Kailun | https://codepen.io/Kailun/pen/gOxamPM | | |
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| Jun Hua | https://codepen.io/ydsyvkph/pen/eYEpRQV | | |
| Ralph Tseng | https://codepen.io/Ralph19/pen/yLoYvQN | | |
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| Huan Pei |https://codepen.io/patrickrrr007/pen/WNEwyzK?editors=0010 |
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