ee1e8abd87
* feat(tools): add seed/solution restore script * chore(curriculum): remove empty sections' markers * chore(curriculum): add seed + solution to Chinese * chore: remove old formatter * fix: update getChallenges parse translated challenges separately, without reference to the source * chore(curriculum): add dashedName to English * chore(curriculum): add dashedName to Chinese * refactor: remove unused challenge property 'name' * fix: relax dashedName requirement * fix: stray tag Remove stray `pre` tag from challenge file. Signed-off-by: nhcarrigan <nhcarrigan@gmail.com> Co-authored-by: nhcarrigan <nhcarrigan@gmail.com>
150 lines
2.2 KiB
Markdown
150 lines
2.2 KiB
Markdown
---
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id: 56533eb9ac21ba0edf2244dc
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title: 多个 if else 语句
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challengeType: 1
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videoUrl: 'https://scrimba.com/c/caeJgsw'
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forumTopicId: 16772
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dashedName: chaining-if-else-statements
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---
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# --description--
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`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`语句串联在一起的伪代码：
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```js
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if (condition1) {
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statement1
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} else if (condition2) {
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statement2
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} else if (condition3) {
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statement3
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. . .
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} else {
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statementN
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}
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```
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# --instructions--
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把`if`/`else if`语句串联起来实现下面的逻辑：
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`num < 5`- return "Tiny"
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`num < 10`- return "Small"
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`num < 15`- return "Medium"
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`num < 20`- return "Large"
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`num >= 20` - return "Huge"
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# --hints--
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你应该有至少 4 个`else`表达式。
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```js
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assert(code.match(/else/g).length > 3);
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```
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你应该有至少 4 个`if`表达式。
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```js
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assert(code.match(/if/g).length > 3);
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```
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你应该有至少 1 个`return`表达式。
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```js
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assert(code.match(/return/g).length >= 1);
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```
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`testSize(0)`应该返回 "Tiny"。
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```js
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assert(testSize(0) === 'Tiny');
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```
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`testSize(4)`应该返回 "Tiny"。
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```js
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assert(testSize(4) === 'Tiny');
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```
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`testSize(5)`应该返回 "Small"。
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```js
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assert(testSize(5) === 'Small');
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```
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`testSize(8)`应该返回 "Small"。
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```js
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assert(testSize(8) === 'Small');
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```
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`testSize(10)`应该返回 "Medium"。
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```js
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assert(testSize(10) === 'Medium');
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```
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`testSize(14)`应该返回 "Medium"。
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```js
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assert(testSize(14) === 'Medium');
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```
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`testSize(15)`应该返回 "Large"。
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```js
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assert(testSize(15) === 'Large');
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```
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`testSize(17)`应该返回 "Large"。
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```js
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assert(testSize(17) === 'Large');
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```
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`testSize(20)`应该返回 "Huge"。
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```js
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assert(testSize(20) === 'Huge');
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```
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`testSize(25)`应该返回 "Huge"。
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```js
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assert(testSize(25) === 'Huge');
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```
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# --seed--
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## --seed-contents--
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```js
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function testSize(num) {
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// Only change code below this line
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return "Change Me";
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// Only change code above this line
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}
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testSize(7);
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```
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# --solutions--
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```js
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function testSize(num) {
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if (num < 5) {
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return "Tiny";
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} else if (num < 10) {
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return "Small";
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} else if (num < 15) {
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return "Medium";
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} else if (num < 20) {
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return "Large";
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} else {
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return "Huge";
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}
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}
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```
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