2021-05-05 10:13:49 -07:00
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---
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id: 56533eb9ac21ba0edf2244d7
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title: 小於或等於運算符
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challengeType: 1
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videoUrl: 'https://scrimba.com/c/cNVR7Am'
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forumTopicId: 16788
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dashedName: comparison-with-the-less-than-or-equal-to-operator
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---
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# --description--
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使用小於等於運算符(`<=`)比較兩個數字的大小。 如果在小於等於運算符左邊的數字小於或者等於右邊的數字,它會返回 `true`。 如果在小於等於運算符左邊的數字大於右邊的數字,它會返回 `false`。 與相等運算符類似,小於或等於運算符會轉換數據類型。
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**例如**
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```js
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2022-03-23 19:52:04 +05:30
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4 <= 5 // true
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'7' <= 7 // true
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5 <= 5 // true
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3 <= 2 // false
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'8' <= 4 // false
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2021-05-05 10:13:49 -07:00
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```
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# --instructions--
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2022-03-23 19:52:04 +05:30
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將小於或等於運算符添加到指示的行,以便返回語句有意義。
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2021-05-05 10:13:49 -07:00
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# --hints--
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`testLessOrEqual(0)` 應該返回 `Smaller Than or Equal to 12`
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```js
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assert(testLessOrEqual(0) === 'Smaller Than or Equal to 12');
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```
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`testLessOrEqual(11)` 應該返回 `Smaller Than or Equal to 12`
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```js
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assert(testLessOrEqual(11) === 'Smaller Than or Equal to 12');
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```
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`testLessOrEqual(12)` 應該返回 `Smaller Than or Equal to 12`
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```js
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assert(testLessOrEqual(12) === 'Smaller Than or Equal to 12');
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```
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`testLessOrEqual(23)` 應該返回 `Smaller Than or Equal to 24`
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```js
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assert(testLessOrEqual(23) === 'Smaller Than or Equal to 24');
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```
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`testLessOrEqual(24)` 應該返回 `Smaller Than or Equal to 24`
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```js
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assert(testLessOrEqual(24) === 'Smaller Than or Equal to 24');
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```
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`testLessOrEqual(25)` 應該返回 `More Than 24`
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```js
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assert(testLessOrEqual(25) === 'More Than 24');
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```
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`testLessOrEqual(55)` 應該返回 `More Than 24`
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```js
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assert(testLessOrEqual(55) === 'More Than 24');
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```
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應該使用 `<=` 運算符至少兩次
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```js
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assert(code.match(/val\s*<=\s*('|")*\d+('|")*/g).length > 1);
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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 testLessOrEqual(val) {
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if (val) { // Change this line
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return "Smaller Than or Equal to 12";
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}
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if (val) { // Change this line
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return "Smaller Than or Equal to 24";
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}
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return "More Than 24";
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}
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testLessOrEqual(10);
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```
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# --solutions--
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```js
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function testLessOrEqual(val) {
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if (val <= 12) { // Change this line
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return "Smaller Than or Equal to 12";
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}
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if (val <= 24) { // Change this line
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return "Smaller Than or Equal to 24";
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}
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return "More Than 24";
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}
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```
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