---
tags: 公益程式體驗營 - 2022
---

# 🏅 5/25(三) 每日 JS 刷題任務 - 陣列操作

### 題目一：陣列索引
* 陣列索引，點出是第幾筆資料

const numAry = [1,3,4,6,8];

// input 輸入
checkNum(3)
checkNum(9)
checkNum(83)
checkNum(6)

// output 
位置在第2筆
false
false
位置在第4筆

### 題目二：陣列相乘
* 將陣列裡面的各個陣列數字相乘

const doubleAry = [
    [1,2,3],
    [3,5,6],
    [2,2,2,2],
];

// input 輸入
callAry(doubleAry)

// output 
"第1個陣列相乘是6，第2個陣列相乘是90，第三個陣列相乘是16"

### 題目三：陣列排序
* 正序、反序設計

const a = [1,3,4,6,8];
const b = [3,6,12];
// input 輸入
sortAry("從小到大",[8,3,1,7])
sortAry("從小到大",[99,22,11,33])
sortAry("從大到小",[7,2,33,4])


// output
[1,3,7,8]
[11,22,33,99]
[33,7,4,2]

## 回報流程

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