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---
id: 56533eb9ac21ba0edf2244df
title: 在 Switch 語句添加多個相同選項
challengeType: 1
videoUrl: 'https://scrimba.com/c/cdBKWCV'
forumTopicId: 18242
dashedName: multiple-identical-options-in-switch-statements
---
# --description--
如果你忘了給 `switch` 的每一條 `case` 添加 `break`,那麼後續的 `case` 會一直執行,直到遇見 `break` 爲止。 如果你想爲 `switch` 中的多個不同的輸入設置相同的結果,可以這樣寫:
```js
let result = "";
switch(val) {
case 1:
case 2:
case 3:
result = "1, 2, or 3";
break;
case 4:
result = "4 alone";
}
```
這樣1、2、3 都會有相同的結果。
# --instructions--
請寫一個 switch 語句,按如下條件設置 `answer`
`1-3` - `Low`
`4-6` - `Mid`
`7-9` - `High`
**提示:** 你的 `case` 應寫全範圍中的每一個數字。
# --hints--
`sequentialSizes(1)` 應該返回字符串 `Low`
```js
assert(sequentialSizes(1) === 'Low');
```
`sequentialSizes(2)` 應該返回字符串 `Low`
```js
assert(sequentialSizes(2) === 'Low');
```
`sequentialSizes(3)` 應該返回字符串 `Low`
```js
assert(sequentialSizes(3) === 'Low');
```
`sequentialSizes(4)` 應該返回字符串 `Mid`
```js
assert(sequentialSizes(4) === 'Mid');
```
`sequentialSizes(5)` 應該返回字符串 `Mid`
```js
assert(sequentialSizes(5) === 'Mid');
```
`sequentialSizes(6)` 應該返回字符串 `Mid`
```js
assert(sequentialSizes(6) === 'Mid');
```
`sequentialSizes(7)` 應該返回字符串 `High`
```js
assert(sequentialSizes(7) === 'High');
```
`sequentialSizes(8)` 應該返回字符串 `High`
```js
assert(sequentialSizes(8) === 'High');
```
`sequentialSizes(9)` 應該返回字符串 `High`
```js
assert(sequentialSizes(9) === 'High');
```
你不應使用 `if``else` 語句。
```js
assert(!/else/g.test(code) || !/if/g.test(code));
```
你應該編寫 9 個`case`語句。
```js
assert(code.match(/case/g).length === 9);
```
# --seed--
## --seed-contents--
```js
function sequentialSizes(val) {
let answer = "";
// Only change code below this line
// Only change code above this line
return answer;
}
sequentialSizes(1);
```
# --solutions--
```js
function sequentialSizes(val) {
let answer = "";
switch(val) {
case 1:
case 2:
case 3:
answer = "Low";
break;
case 4:
case 5:
case 6:
answer = "Mid";
break;
case 7:
case 8:
case 9:
answer = "High";
}
return answer;
}
```