---
tags: 軟體工程師體驗營 - 2025
---

# 🏅 JS 任務 Day5 - if 流程判斷 I
> 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

### 題目一：成年計算機 ( 備註：18 歲為成年年紀 )

// input 輸入
checkAdult(20)
checkAdult(12)
checkAdult(33)
checkAdult(18)
// output 輸出
"成年"
"未成年"
"成年"
"成年"

### 題目二：法定性行為年紀計算機( 16歲 )

// input 輸入
canSex(16,"male")
canSex(14,"female")
canSex(20,"female")
// output 輸出
"可以色色"
"你還不行哦~"
"可以色色"

### 題目三：滿 300 即可符合優惠條件，能使用 50 元折價券

// input 輸入
buy(450)
buy(299)
buy(0)
buy(-30)
buy(300)
buy(1000)

// output 輸出
"符合優惠券資格，費用是 400"
"不優惠券資格，費用是 299"
"...你來亂的嗎？"
"再鬧我就生氣了哦~"
"剛好符合資格，費用是 250"
"符合優惠券資格，費用是 950"

## 進階題，不適合新手
### 是否為質數

// input 輸入
isPrime(29)
isPrime(17)
isPrime(-3)
isPrime(288)
isPrime(97)
isPrime(6)
// output 輸出
"是質數"
"是質數"
"無法判別"
"我只能算 100 以內的質數計算，原諒我QQ"
"是質數"
"不是質數"

## 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 checkAdult(age) {
if (age >= 18) {
console.log("成年");
} else {
console.log("未成年");
}
}

題目二：
function canSex(age, gender) {
if (age >= 16) {
console.log("可以色色");
} else {
console.log("你還不行哦~");
}
}
題目三：
function buy(amount) {
if (amount < 0) {
console.log("再鬧我就生氣了哦~");
} else if (amount === 0) {
console.log("...你來亂的嗎？");
} else if (amount > 300) {
console.log(`符合優惠券資格，費用是 ${amount - 50}`);
} else if (amount === 300) {
console.log("剛好符合資格，費用是 250");
} else {
console.log(`不優惠券資格，費用是 ${amount}`);
}
}

進階題：
function isPrime(n) {
if (n <= 1) {
console.log("無法判別");
return;
}
if (n > 100) {
console.log("我只能算 100 以內的質數計算，原諒我QQ");
return;
}
for (let i = 2; i <= Math.sqrt(n); i++) {
if (n % i === 0) {
console.log("不是質數");
return;
}
}
console.log("是質數");
}
-->

回報區
---

| 報數 | Discord 名字 | Codepen／其他回饋 |
|:----:|:------------:| ----------------------------------------------------------------------------- |
| 1 | 力文 | [codepen](https://codepen.io/liwenchiou/pen/GggQdgm?editors=0011) |
| 2 | 4chan | [Codepen](https://codepen.io/ijuolaqc-the-looper/pen/xbKpGrN) |
| 3 | dean | [Codepen](https://codepen.io/ch933114/pen/PwwQeYj?editors=0011) |
| 4 | 蛋殼 | [Codepen](https://codepen.io/weybrian/pen/emmVrYX) |
| 5 | 7Lun | [Day5-Codepen](https://codepen.io/mfyvqhsn-the-bold/pen/KwwQRqJ?editors=0011) |
| 6 | 蛋白 | [蛋白的JS Codepen Day5](https://codepen.io/sjlu-0/pen/qEExYGm) |
| 7 | RUDY | [Codepen](https://codepen.io/Rudy-crw/pen/wBByXdL?editors=0011) |
| 8 | Cami | [Codepen](https://codepen.io/irisLife/pen/azzqGep) |
| 9 | 林明德 | [Codepen](https://codepen.io/lwescocn-the-vuer/pen/zxxRaPd) |
| 10 | WAWATA | [Codepen](https://codepen.io/wa-wa-GNOHC-WA-Wa/pen/NPPyzLG) |
| 11 | Toung | [Codepen](https://codepen.io/Toung/pen/emmVKYZ) |
| 12 | 小趴 | [Codepen](https://codepen.io/papa2415/pen/bGJyvJP) |
| 13 | Joseph_Kyuu | [Codepen](https://codepen.io/zrzfastd-the-reactor/pen/XJJZYRM) |
| 14 | Saika | [Codepen](https://codepen.io/saika4501/pen/WbbMzmM?editors=0011) |
| 15 | Pastor | [Codepen](https://codepen.io/peter_hung/pen/gbbvjym) |
| 16 | mambo | [Codepen](https://codepen.io/chiang_mb/pen/oggEQMv) |
| 17 | 馬德 | [Codepen](https://codepen.io/maywang/pen/WbbMJYm?editors=0012) |
| 18 | Kath | [Codepen](https://codepen.io/JLin-the-lessful/pen/WbbMYNG) |
| 19 | Eden | [Codepen](https://codepen.io/iseden/pen/xbbYMZd) |
| 20 | ying | [Codepen](https://codepen.io/Lara-Lin/pen/LEEQvbG?editors=1111) |
| 21 | EdenWu | [CodePen](https://codepen.io/eden-wu/pen/MYYQMBX) |
| 22 | Ali | [CodePen](https://codepen.io/Alicia1117/pen/ByyYgpK) |
| 23 | ann#6212 | [CodePen](https://codepen.io/yqmegupa-the-styleful/pen/myyXNZx) |
| 24 | Archang | [CodePen](https://codepen.io/pxfnrvgk-the-styleful/pen/gbbvqYd) |
| 25 | nora_zizi | [CodePen](https://codepen.io/Nora-Ch/pen/emmMYzy?editors=1111) |
| 26 | wei_0982 | [CodePen](https://codepen.io/nico-lai/pen/jEEZRWp) |
| 27 | Hugh | [CodePen](https://codepen.io/Hugh-Chen/pen/oggqzXX?editors=1111) |
| 28 | B | [CodePen](https://codepen.io/Babel777/pen/raadMoa) |
| 29 | Apple Pie | [CodePen](https://codepen.io/ymevqzjf-the-builder/pen/raaJEGK?editors=0011) |
| 30 | 牛奶 | [CodePen](https://codepen.io/0omilko0/pen/bNNvrLM?editors=0011) |
| 31 | Nora | [CodePen](https://codepen.io/Yun-Jhen-Dai/pen/jEEzZxE?editors=1011) |
| 32 | 野鴿 | [CodePen](https://codepen.io/HoshinoSyouta/pen/myyxdJN?editors=1010) |
| 33 | yang | [codepen](https://codepen.io/Yang-J/pen/MYYGWBO?editors=0012) |
| 34 | CBK | [codepen](https://codepen.io/BK-C-the-styleful/pen/MYYGYKB?editors=1010) |
| 35 | 周周 | [codepen](https://codepen.io/jhoujhou-the-decoder/pen/WbbJQdG?editors=0012) |
| 36 | YuTing | [CodePen](https://codepen.io/venus50533/pen/myyLVBR?editors=0010) |
| 37 | 叮咚 | [CodePen](https://codepen.io/pinchieh-lin/pen/emmrJQa?editors=1111) |
| 38 | Leonard | [CodePen](https://codepen.io/hyyfjqra-the-sans/pen/zxxjBOd) |
| 39 | Jingle0900 | [CodePen](https://codepen.io/EvaLi0472/pen/vEEjerj) |
| 40 | mercury2508. | [Codepen](https://codepen.io/Mercury2508/pen/pvvVrBq)
| 41 | Jessie | [Jessie 的 Codepen](https://codepen.io/bakyfkso-the-looper/pen/LEEmmzY)
| 42 | BL | [Codepen](https://codepen.io/bonnieli1414/pen/ZYYooXq?editors=0012)
| 43 | stone | [Codepen](https://codepen.io/bgrwlzoz-the-reactor/pen/EaaLLdq)
| 44 | 登登登 | [Codepen](https://codepen.io/Duncanin/pen/OPPZoRb)
| 45 | William Hsieh | [Codepen](https://codepen.io/lsaimqxa-the-vuer/pen/ZYYRbeL?editors=0012)
| 46 | Owen He | [Codepen](https://codepen.io/owen1120/pen/gbbKojL?editors=0012)
| 47 | WEIWEI | [Codepen](https://codepen.io/weiwei93/pen/xbbWLqx)
| 48 | ninii | [Codepen](https://codepen.io/niiniiii/pen/YPPjVJQ?editors=1111)
| 49 | Rogan | [Codepen](https://codepen.io/RoganHsu/pen/NPPLWRo?editors=1111)
| 50 | tung | [Codepen](https://codepen.io/oltsegon-the-looper/pen/xbbaZYa)
| 51 | yue | [Codepen](https://codepen.io/Ling-the-scripter/pen/OPPoNOj?editors=1012)
| 52 | 姜承 | [Codepen](https://codepen.io/Troy0718/pen/oNaoZdp?editors=1112)
| 53 | Peggy| [Codepen D1to5](https://codepen.io/cpt23462599/pen/gbbdeOo)|
| 54 | Sonia| [Codepen D1to5](https://codepen.io/YUJOU/pen/jEEePWL?editors=0011)|
| 55 | oyll| [Codepen D1to5](https://codepen.io/dizzydog-rgb/pen/gbbBaQd?editors=0011)|
| 56 | Ariel | [Codepen](https://codepen.io/ariel0510/pen/YPPOooL?editors=0011)
|57|JHT|[Codepen](https://codepen.io/juanht/pen/jEEdrzZ?editors=0012)|
| 56 |kelsonhouse|[Codepen](https://codepen.io/Kelson-House/pen/PwwVaEv?editors=0011)|
| 57 | vima |[Codepen](https://codepen.io/chin7004/pen/MYYxaQV?editors=0011)|
| 58 | duchi |[Codepen](https://codepen.io/sqaz0502/pen/jEEJxMK)|
| 59 | ja4071 |[Codepen](https://codepen.io/SHAO-L/pen/dPPrRgb)
| 60 | allen3290 |[Codepen](https://codepen.io/udadkudw-the-looper/pen/MYYRXBw?editors=1111)
| 61 | taishan_90178|[Codepen](https://codepen.io/candy99/pen/PwwrBQV?editors=0012)
| 62 |Yi-Kuei |[Codepen](https://codepen.io/Yi-Kuei-Chuang/pen/QwweXxR?editors=1111)
| 63 |Mic |[Codepen](https://codepen.io/Mic-Pan/pen/ogXvxMX?editors=0011)
| 64 | xiaocai_97765 | [Codepen](https://codepen.io/dupre55667788/pen/YPXzKaP)
| 65 | rinn | [Codepen](https://codepen.io/cqsioetr-the-bold/pen/KwppXww?editors=0011)
| 66 | 610 | [Codepen](https://codepen.io/YI-LING-LIU/pen/ByNjJmd)
| 67 | kent_31665 | [Codepen](https://codepen.io/kentlee406/pen/YPXqppV?editors=0011)
| 68 | World | [Codepen](https://codepen.io/HexschoolVuePujols/pen/EajROap)
| 69 | Chuang | [Codepen](https://codepen.io/uidoytjq-the-solid/pen/gbpZMYe?editors=0012)
| 70 | haohaoliao | [codepen](https://codepen.io/yuyuyuhaohao/pen/QwybqEz?editors=0012)