---
tags: 30 天軟體工程師體驗營｜2025
---
> 建議觀看的影音章節：
> JS - 流程判斷 - if、else if、else
> JS - if 流程圖規劃流程
> JS - if 中階運用

# 🏅 JS 任務 Day6 - if 流程判斷 II

### 題目一：日幣計算機 (1:0.32)

// input 輸入
TWDtoJPY(-1)
TWDtoJPY("hi~")
TWDtoJPY(2000)
TWDtoJPY(320)
// output 輸出
"...沒錢別來亂"
"當我看不懂字串？？"
"你換到的日幣有：6250"
"你換到的日幣有：1000"

### 題目二：匯率計算機
* 美金：1:29
* 港幣：1:3
* 英鎊：1:35

// input 輸入
TWDtoAnother(100,"USD")
TWDtoAnother(100,"Sword Art Online")
TWDtoAnother(100,"HKD")
TWDtoAnother(100,"GBP")

// output 輸出
"2900"
"..."
"300"
"3500"

### 題目三：BMI 計算機
* [公式](https://depart.femh.org.tw/dietary/3OPD/BMI.htm)

// input 輸入 
// BMI(身高,體重)

// output 輸出
"正常"
"重度肥胖"
"中度肥胖"
"輕度肥胖"
"過重"
"過輕"

## 進階題，不適合新手
### 字串切割+if
* 如果第一個數字是質數，請將第二、三個數字加總
* 如果第一個數字是偶數，請將第二、三個數字相減
* 如果第一個數字不是質數也不是偶數，請將第二、三個數字相乘

// input 輸入
sum("13,20,10")
sum("10,2,3")
sum("9,5,7")
// output 輸出
30
-1
35

## 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」）


## 回報區

| 報數 | Discord 名字 | CodePen／其他回饋 |
|:----:|:------------:| ------------------------------------------------------------------------------- |
| 1 | 蛋白 | [蛋白的JS CodePen Day6](https://codepen.io/sjlu-0/pen/wBBjggB)|
|2|小趴|[Codepen](https://codepen.io/papa2415/pen/yLrWrjb)|
| 3 | 4chan | [Codepen](https://codepen.io/ijuolaqc-the-looper/pen/vEEjgGv)|
| 4 | dean | [codepen](https://codepen.io/ch933114/pen/ByyxpVj?editors=0011)|
| 5 | ying | [Codepen](https://codepen.io/Lara-Lin/pen/vEEjxgL?editors=1111)|
| 6 | B | [Codepen](https://codepen.io/Babel777/pen/MYYGJMV)|
| 7 | 叮咚 | [Codepen](https://codepen.io/pinchieh-lin/pen/yyyjoOj?editors=1111)|
| 8 | RUDY | [Codepen](https://codepen.io/Rudy-crw/pen/WbbJEgJ?editors=0010)|
| 9 | Toung | [Codepen](https://codepen.io/Toung/pen/LEEmWrp)
| 10 | 馬德 | [Codepen](https://codepen.io/maywang/pen/xbbjgoM)
| 11 | Archang | [CodePen](https://codepen.io/pxfnrvgk-the-styleful/pen/KwwRqoW)|
| 12 | pastor | [Codepen](https://codepen.io/peter_hung/pen/vEEjxqm)|
| 13 | 登登登 | [Codepen](https://codepen.io/Duncanin/pen/bNNMRbb) |
| 14 | Joseph_Kyuu| [Codepen](https://codepen.io/zrzfastd-the-reactor/pen/jEExLjQ) |
| 15 | Anna | [Codepen](https://codepen.io/Anna-Teng/pen/gbbzXYE?editors=1011)|
|16|Saika| [Codepen](https://codepen.io/saika4501/pen/GggdyNq?editors=0011)|
|17|ann.328| [Codepen](https://codepen.io/yqmegupa-the-styleful/pen/wBBjybb)|
|18|7Lun| [Day6-Codepen](https://codepen.io/mfyvqhsn-the-bold/pen/gbbeMjr)|
| 19 | 力文 | [CodePen](https://codepen.io/liwenchiou/pen/pvvVLNE?editors=0011)|
| 20 | CBK | [CodePen](https://codepen.io/BK-C-the-styleful/pen/Pwweayx)|
| 21 | WAWATA | [CodePen](https://codepen.io/wa-wa-GNOHC-WA-Wa/pen/WbbJKeN)|
| 22 | 清蒸蚊子(avytaurus) | [CodePen](https://codepen.io/jtmlthhe-the-bashful/pen/zxxjLxz)|
| 23 | Jessie | [Jessie 的 Codepen](https://codepen.io/bakyfkso-the-looper/pen/azzGGPb)
| 24 | BL | [Codepen](https://codepen.io/bonnieli1414/pen/myyLKQj?editors=0011)
| 25 | 牛奶 | [CodePen](https://codepen.io/0omilko0/pen/gbbzdrM?editors=0011)|
| 26 | Hugh | [CodePen](https://codepen.io/Hugh-Chen/pen/ZYYojNr?editors=0011)|
| 27 | mambo | [CodePen](https://codepen.io/chiang_mb/pen/raavZGo)|
| 28 | ArvinSu | [Codepen](https://codepen.io/Arvin-Su/pen/azzGaxb) |
|29|yang|[codepen](https://codepen.io/Yang-J/pen/emmrLoa?editors=0012)|
|30| mercury2508. |[Codepen](https://codepen.io/Mercury2508/pen/QwwrRwZ)|
| 31 | Cami | [Codepen](https://codepen.io/irisLife/pen/LEEmQGb)|
| 32 | wei_0982 | [Codepen](https://codepen.io/nico-lai/pen/KwwRZxx)|
| 33 | stone | [Codepen](https://codepen.io/bgrwlzoz-the-reactor/pen/bNNKbNM)|
| 34 | Ali | [Codepen](https://codepen.io/Alicia1117/pen/LEEmJjP) |
| 35 | Ali | [Codepen](https://codepen.io/HoshinoSyouta/pen/LEEmJBV?editors=0012) |
| 36 | Kath | [Codepen](https://codepen.io/JLin-the-lessful/pen/pvvKyYo) |
| 37 | 野鴿 | [Codepen](https://codepen.io/HoshinoSyouta/pen/LEEmJBV) |
| 38 | William Hsieh | [Codepen](https://codepen.io/lsaimqxa-the-vuer/pen/XJJYKqz?editors=0012) |
| 39 | nora_zizi | [Codepen](https://codepen.io/Nora-Ch/pen/raaKLQY?editors=1111) |
| 40 | jingle0900 | [Codepen](https://codepen.io/EvaLi0472/pen/bNNKMZY?editors=1010) |
| 41 | WEIWEI | [Codepen](https://codepen.io/weiwei93/pen/xbbWLPG) |
| 42 | Chuang | [Codepen](https://codepen.io/uidoytjq-the-solid/pen/zxxLYVp) |
| 43 | Leonard | [Codepen](https://codepen.io/hyyfjqra-the-sans/pen/azzjZww)
| 44 | Apple Pie | [Codepen](https://codepen.io/ymevqzjf-the-builder/pen/zxxjNML?editors=0011) 進階題待補|
| 45 | ninii | [Codepen](https://codepen.io/niiniiii/pen/qEEyjZj?editors=1112)
|46|蛋殼|[Codepen](https://codepen.io/weybrian/pen/JooBgoL)
|47|Rogan|[Codepen](https://codepen.io/RoganHsu/pen/MYYqKyp?editors=1111)
| 48 | Owen He | [Codepen](https://codepen.io/owen1120/pen/dPPKgNp?editors=0012)
| 49 | 姜承 | [Codepen](https://codepen.io/Troy0718/pen/jOeaRoE?editors=1011) |
| 50 | Sonia | [Codepen](https://codepen.io/YUJOU/pen/raaqYGN?editors=0012) |
| 51 | oyll | [Codepen](https://codepen.io/dizzydog-rgb/pen/GggYQvo?editors=0011) |
| 52 | Ariel| [Codepen](https://codepen.io/ariel0510/pen/pvvxLeG?editors=0011) |
|53|JHT|[Codepen](https://codepen.io/juanht/pen/KwwJMoo?editors=0012)|
|54|ja4071|[Codepen](https://codepen.io/SHAO-L/pen/PwwgwaJ?editors=1112)|
|55| vima |[Codepen](https://codepen.io/chin7004/pen/QwwoBmv?editors=0011)|
|56| kelsonhouse |[Codepen](https://codepen.io/Kelson-House/pen/MYYRozO?editors=0012)|
| 57 | YuTing | [Codepen](https://codepen.io/venus50533/pen/gbbyjjO) |
| 58 | allen3290 | [Codepen](https://codepen.io/udadkudw-the-looper/pen/raabEYG?editors=1111) |
| 59 | duchi | [Codepen](https://codepen.io/sqaz0502/pen/MYYxGGR) |
| 60 | Mic | [Codepen](https://codepen.io/Mic-Pan/pen/qEdWZMB?editors=0011) |
| 61 | Yi-Kuei | [Codepen](https://codepen.io/Yi-Kuei-Chuang/pen/qEdWMjx?editors=1112) |
| 62 | Xiaocai_97765 | [Codepen](https://codepen.io/dupre55667788/pen/qEdBVzR?editors=0110)
| 63 | 610 | [Codepen](https://codepen.io/YI-LING-LIU/pen/PwqZBPv)
| 64 | taishan_90178 | [Codepen](https://codepen.io/candy99/pen/zxGEYmj?editors=0012)
| 65 | rinn | [Codepen](https://codepen.io/cqsioetr-the-bold/pen/MYwjWBy?editors=0011)
| 66 | kent_31665 | [Codepen](https://codepen.io/kentlee406/pen/emNKLOo)
| 67 | World | [Codepen](https://codepen.io/HexschoolVuePujols/pen/xbGabXx)
| 68 | haohaoliao | [Codepen](https://codepen.io/yuyuyuhaohao/pen/qEbdPYj)
<!-- 解答：
題目一：
function TWDtoJPY(twd) {
if (typeof twd !== "number") {
return "當我看不懂字串？？";
}
if (twd < 0) {
return "...沒錢別來亂";
}
const jpy = Math.floor(twd / 0.32);
return `你換到的日幣有：${jpy}`;
}

題目二：
function TWDtoAnother(twd, currency) {
const rates = {
USD: 29,
HKD: 3,
GBP: 35,
};

if (!rates[currency]) {
return "...";
}

return (twd * rates[currency]).toString();
}

題目三：
function BMI(height, weight) {
const h = height / 100;
const bmi = weight / (h * h);

if (bmi < 18.5) return "過輕";
if (bmi < 24) return "正常";
if (bmi < 27) return "過重";
if (bmi < 30) return "輕度肥胖";
if (bmi < 35) return "中度肥胖";
return "重度肥胖";
}

進階題：
function isPrime(n) {
if (n <= 1) return false;
for (let i = 2; i <= Math.sqrt(n); i++) {
if (n % i === 0) return false;
}
return true;
}

function sum(str) {
const [a, b, c] = str.split(',').map(Number);
if (isPrime(a)) return b + c;
if (a % 2 === 0) return b - c;
return b * c;
}

回報區
---

| 報數 | Discord 名字 | Codepen／其他回饋 |
|:----:|:------------:|:-----------------------------------------------------------------------------:|

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