---
tags: 30 天軟體工程師體驗營｜2025
---
# 🏅 JS 任務 Day4 - 比較與邏輯運算子
> 建議觀看的影音章節：
> JS - 比較與邏輯運算子
## 提示
1. [MDN：運算式與運算子](https://developer.mozilla.org/zh-TW/docs/Web/JavaScript/Guide/Expressions_and_Operators)
### 題目一：比大小
``` =JavaScript
// input 輸入
higher(3,2)
higher(100,299)
higher(8,2.5)
// output 輸出
true
false
true
```
### 題目二：布林反轉
:::spoiler 提示(點擊箭頭顯示)
* [! NOT 反轉](https://developer.mozilla.org/zh-TW/docs/Web/JavaScript/Guide/Expressions_and_Operators#%E9%82%8F%E8%BC%AF%E9%81%8B%E7%AE%97%E5%AD%90)
:::
``` =JavaScript
// input 輸入
booleanToggle(true)
booleanToggle(false)
// output 輸出
false
true
```
### 題目三：型別判斷
``` =JavaScript
// input 輸入
checkType(3.33)
checkType("Hello")
checkType(true)
checkType([1,2,3])
// output 輸出
"number"
"string"
"boolean"
"object"
```
### 題目四：打八折後，是否總價大於 100 元
``` =JavaScript
// input 輸入
onSale(200)
onSale(150)
onSale(125)
onSale(100)
// output 輸出
true
true
false
false
```
### 題目五：是否大於 200，且符合會員條件
``` =JavaScript
// input 輸入
checkVIP(300,true)
checkVIP(0,true)
checkVIP(30000,false)
checkVIP(888,true)
// output 輸出
true
false
false
true
```
## 回報流程
1. 將答案貼在 Codepen 並複製 Codepen 連結貼至「回報區」回報
（也可以將答案直接貼至「回報區」）
<!-- 解答：
題目一：
function higher(a, b) {
console.log(a > b);
}
題目二：
function booleanToggle(value) {
console.log(!value);
}
題目三：
function checkType(value) {
console.log(typeof value);
}
題目四：
function onSale(price) {
const discounted = price * 0.8;
console.log(discounted > 100);
}
題目五：
function checkVIP(price, isMember) {
console.log(price > 200 && isMember);
} -->
回報區
---
| 報數 | Discord 名字 | Codepen／其他回饋 |
|:----:|:---------------:|:-----------------------------------------------------------------------------------------------------------------:|
| 1 | dean | [Codepen](https://codepen.io/ch933114/pen/yyypXQG?editors=0011) |
| 2 | Saika | [Codepen](https://codepen.io/saika4501/pen/dPPJRBO?editors=0011)|
| 3 | 4chan | [Codepen](https://codepen.io/ijuolaqc-the-looper/pen/WbedXRa?editors=1011)|
| 4 | wei_0982 | [Codepen](https://codepen.io/nico-lai/pen/xbbpLXg?editors=0012)|
|5|蛋殼|[Codepen](https://codepen.io/weybrian/pen/vEEpJKe)
|6|Benson|[Codepen](https://codepen.io/kumashow/pen/LEEejpb?editors=0012)
|7|里歐|[Codepen](https://codepen.io/akihico/pen/gbboxpv?editors=1010)
| 8 | WAWATA | [Codepen](https://codepen.io/wa-wa-GNOHC-WA-Wa/pen/KwwZXjX)|
|9|小趴|[Codepen](https://codepen.io/papa2415/pen/Pogvorv)|
| 10 | Apple Pie | [Codepen](https://codepen.io/ymevqzjf-the-builder/pen/YPPYLyV?editors=0012) |
| 11 | Joseph_Kyuu | [Codepen](https://codepen.io/zrzfastd-the-reactor/pen/VYYydmE) |
| 12 | Cami | [Codepen](https://codepen.io/irisLife/pen/dPPJKmw)|
| 13 | 新月 | [Codepen](https://codepen.io/gffaufsy-the-bashful/pen/jEEYKdm)|
| 14 | nora_zizi | [Codepen](https://codepen.io/Nora-Ch/pen/qEEpyqz?editors=1111) |
| 15 | ann#6212 | [Codepen](https://codepen.io/yqmegupa-the-styleful/pen/dPPJqXv) |
| 16 | 蛋白 | [蛋白的JS Codepen Day4](https://codepen.io/sjlu-0/pen/bNNYKLw) |
| 17 | 7Lun| [Day4-Codepen](https://codepen.io/mfyvqhsn-the-bold/pen/QwwaVVX?editors=0011) |
| 18 | Kath | [Codepen](https://codepen.io/JLin-the-lessful/pen/oggpPrE) |
| 19 | mambo | [Codepen](https://codepen.io/chiang_mb/pen/bNNaQOL) |
| 20 | 蛋黃 | [Codepen](https://codepen.io/yiyun12o9/pen/ByyJvQV) |
| 21 | Ali | [Codepen](https://codepen.io/Alicia1117/pen/PwwEVNg) |
| 22 | 力文 | [Codepen](https://codepen.io/liwenchiou/pen/RNNxvym?editors=0011) |
| 23 | pastor | [Codepen](https://codepen.io/peter_hung/pen/NPPXJPp)|
| 24 | Archang | [Codepen](https://codepen.io/pxfnrvgk-the-styleful/pen/wBBpVMj?editors=1111)|
| 25 | 馬德 | [Codepen](https://codepen.io/maywang/pen/pvvpmWN)|
| 26 | ArvinSu | [Codepen](https://codepen.io/Arvin-Su/pen/myyXPpg)|
| 27 | Toung | [Codepen](https://codepen.io/Toung/pen/MYYQGWZ)
| 28 | RUDY | [Codepen](https://codepen.io/Rudy-crw/pen/jEEZvdo?editors=1111)|
| 29 | yuna | [Codepen](https://codepen.io/Yuna1002/pen/ZYYrMQP?editors=0111)|
| 30 | 野鴿 | [Codepen](https://codepen.io/HoshinoSyouta/pen/qEExeqO?editors=1011)|
| 31 | 牛奶 | [Codepen](https://codepen.io/0omilko0/pen/NPPYWrR?editors=0011)|
| 32 | Hugh | [Codepen](https://codepen.io/Hugh-Chen/pen/NPPYrLg?editors=1111)|
| 33 | B | [Codepen](https://codepen.io/Babel777/pen/XJJEjVr)|
| 34 | WEIWEI | [Codepen](https://codepen.io/weiwei93/pen/VYYXzja) |
| 35 | Nora | [Codepen](https://codepen.io/Yun-Jhen-Dai/pen/dPPmJav?editors=1011) |
| 36 | stone | [Codepen](https://codepen.io/bgrwlzoz-the-reactor/pen/OPPvKyp) |
| 37 |yang|[codepen](https://codepen.io/Yang-J/pen/pvvLpwx?editors=0012)|
| 38 | Jessie | [Jessie 的 Codepen](https://codepen.io/bakyfkso-the-looper/pen/KwwRKOZ)
| 39 | 周周 | [Codepen](https://codepen.io/jhoujhou-the-decoder/pen/xbbjGoP?editors=0012)
|40|YuTing|[Codepen](https://codepen.io/venus50533/pen/Qwwrjmd?editors=0011)|
| 41 | Leonard | [Codepen](https://codepen.io/hyyfjqra-the-sans/pen/azzGNJm) |
| 42 | jingle0900 | [Codepen](https://codepen.io/EvaLi0472/pen/gbbzmmg?editors=1010) |
| 43 | mercury2508. | [Codepen](https://codepen.io/Mercury2508/pen/jEExLwz) |
| 44 | BL | [Codepen](https://codepen.io/bonnieli1414/pen/Gggddgo?editors=0012) |
| 45 | 登登登 | [Codepen](https://codepen.io/Duncanin/pen/QwwreeB) |
| 46 | William Hsieh | [Codepen](https://codepen.io/lsaimqxa-the-vuer/pen/RNNJPyQ?editors=0012) |
| 47 | tung | [Codepen](https://codepen.io/oltsegon-the-looper/pen/GggGqXV) |
| 48 | Owen He | [Codepen](https://codepen.io/owen1120/pen/azzKEVX?editors=0012) |
| 49 | Rogan | [Codepen](https://codepen.io/RoganHsu/pen/MYYBYwv) |
| 50 | ninii | [Codepen](https://codepen.io/niiniiii/pen/pvvZvwW?editors=1111) |
| 51 | yue | [Codepen](https://codepen.io/Ling-the-scripter/pen/raardOO?editors=0011) |
| 52 | 姜承 | [Codepen](https://codepen.io/Troy0718/pen/WNaXRXJ?editors=1111) |
| 53 | Peggy| [Codepen D1to5]
| 54 | Ariel | [Codepen](https://codepen.io/ariel0510/pen/bNNxzma?editors=0011) | (https://codepen.io/cpt23462599/pen/gbbdeOo)|(https://codepen.io/cpt23462599/pen/gbbdeOo)|
| 55 | Sonia | [Codepen](https://codepen.io/YUJOU/pen/gbbBbVp?editors=0011) |
| 56 | oyll | [Codepen](https://codepen.io/pen/?editors=0011) |
|57|JHT|[Codepen](https://codepen.io/juanht/pen/WbbPxzX?editors=0012)|
| 58 | Acadia | [Codepen](https://codepen.io/Acadia/pen/MYYLJpG?editors=0011) |
| 59 | ja4071 | [Codepen](https://codepen.io/SHAO-L/pen/yyyZJvE) |
| 60 | vima | [Codepen](https://codepen.io/chin7004/pen/QwwobNe?editors=0011) |
| 61 | duchi | [Codepen](https://codepen.io/sqaz0502/pen/gbbEezP) |
| 62 | Holly | [Codepen](https://codepen.io/LEE-HOLLY/pen/GggLvrj)
| 63 | allen3290 | [Codepen](https://codepen.io/udadkudw-the-looper/pen/xbbepBG?editors=1111)
| 64 |Yi-Kuei | [Codepen](https://codepen.io/Yi-Kuei-Chuang/pen/VYYJWoq?editors=1112)
| 65 |taishan_90178 | [Codepen](https://codepen.io/candy99/pen/wBBLxPZ?editors=0012)
| 66 |Mic | [Codepen](https://codepen.io/Mic-Pan/pen/jEPNqxz?editors=0011)
| 67 |xiaocai_97765 | [Codeoen](https://codepen.io/dupre55667788/pen/JodjyLO?editors=0010)
| 68 |rinn | [Codeoen](https://codepen.io/cqsioetr-the-bold/pen/EajjXYp?editors=1111)
| 69 |610 | [Codeoen](https://codepen.io/YI-LING-LIU/pen/myJVqpN)
| 70 |kent_31665 | [Codeoen](https://codepen.io/kentlee406/pen/ByNKzLg?editors=0011)
| 71 |World | [Codeoen](https://codepen.io/HexschoolVuePujols/pen/EajRLYY)
| 72 |Chuang | [Codeoen](https://codepen.io/uidoytjq-the-solid/pen/YPXdqgV?editors=0012)
| 73 | haohaoliao | [codepen](https://codepen.io/yuyuyuhaohao/pen/VYewyRM?editors=0012)
| 74 | Melanie | [codepen](https://codepen.io/pnrcspte-the-animator/pen/zxrXQpN?editors=0010)
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