Files
2021-03-14 21:20:39 -06:00

150 lines
2.3 KiB
Markdown
Raw Permalink Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

---
id: 56533eb9ac21ba0edf2244dc
title: 多个 if else 语句
challengeType: 1
videoUrl: 'https://scrimba.com/c/caeJgsw'
forumTopicId: 16772
dashedName: chaining-if-else-statements
---
# --description--
`if/else` 语句串联在一起可以实现复杂的逻辑。 这是多个 `if` / `else if` 语句串联在一起的<dfn>伪代码</dfn>
```js
if (condition1) {
statement1
} else if (condition2) {
statement2
} else if (condition3) {
statement3
. . .
} else {
statementN
}
```
# --instructions--
请将 `if`/`else if` 语句串联起来,实现下面的逻辑:
`num < 5` - 返回 `Tiny`
`num < 10` - 返回 `Small`
`num < 15` - 返回 `Medium`
`num < 20` - 返回 `Large`
`num >= 20` - 返回 `Huge`
# --hints--
应至少有 4 个 `else` 语句。
```js
assert(code.match(/else/g).length > 3);
```
应至少有 4 个 `if` 语句。
```js
assert(code.match(/if/g).length > 3);
```
应至少有 1 个 `return` 语句。
```js
assert(code.match(/return/g).length >= 1);
```
`testSize(0)` 应该返回字符串 `Tiny`
```js
assert(testSize(0) === 'Tiny');
```
`testSize(4)` 应该返回字符串 `Tiny`
```js
assert(testSize(4) === 'Tiny');
```
`testSize(5)` 应该返回字符串 `Small`
```js
assert(testSize(5) === 'Small');
```
`testSize(8)` 应该返回字符串 `Small`
```js
assert(testSize(8) === 'Small');
```
`testSize(10)` 应该返回字符串 `Medium`
```js
assert(testSize(10) === 'Medium');
```
`testSize(14)` 应该返回字符串 `Medium`
```js
assert(testSize(14) === 'Medium');
```
`testSize(15)` 应该返回字符串 `Large`
```js
assert(testSize(15) === 'Large');
```
`testSize(17)` 应该返回字符串 `Large`
```js
assert(testSize(17) === 'Large');
```
`testSize(20)` 应该返回字符串 `Huge`
```js
assert(testSize(20) === 'Huge');
```
`testSize(25)` 应该返回字符串 `Huge`
```js
assert(testSize(25) === 'Huge');
```
# --seed--
## --seed-contents--
```js
function testSize(num) {
// Only change code below this line
return "Change Me";
// Only change code above this line
}
testSize(7);
```
# --solutions--
```js
function testSize(num) {
if (num < 5) {
return "Tiny";
} else if (num < 10) {
return "Small";
} else if (num < 15) {
return "Medium";
} else if (num < 20) {
return "Large";
} else {
return "Huge";
}
}
```