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>
115 lines
2.1 KiB
Markdown
115 lines
2.1 KiB
Markdown
---
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id: 56533eb9ac21ba0edf2244dd
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title: Selecting from Many Options with Switch Statements
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challengeType: 1
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videoUrl: 'https://scrimba.com/c/c4mv4fm'
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forumTopicId: 18277
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dashedName: selecting-from-many-options-with-switch-statements
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---
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# --description--
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If you have many options to choose from, use a <dfn>switch</dfn> statement. A `switch` statement tests a value and can have many <dfn>case</dfn> statements which define various possible values. Statements are executed from the first matched `case` value until a `break` is encountered.
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Here is an example of a `switch` statement:
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```js
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switch(lowercaseLetter) {
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case "a":
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console.log("A");
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break;
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case "b":
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console.log("B");
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break;
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}
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```
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`case` values are tested with strict equality (`===`). The `break` tells JavaScript to stop executing statements. If the `break` is omitted, the next statement will be executed.
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# --instructions--
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Write a switch statement which tests `val` and sets `answer` for the following conditions:
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`1` - "alpha"
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`2` - "beta"
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`3` - "gamma"
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`4` - "delta"
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# --hints--
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`caseInSwitch(1)` should have a value of "alpha"
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```js
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assert(caseInSwitch(1) === 'alpha');
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```
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`caseInSwitch(2)` should have a value of "beta"
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```js
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assert(caseInSwitch(2) === 'beta');
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```
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`caseInSwitch(3)` should have a value of "gamma"
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```js
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assert(caseInSwitch(3) === 'gamma');
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```
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`caseInSwitch(4)` should have a value of "delta"
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```js
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assert(caseInSwitch(4) === 'delta');
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```
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You should not use any `if` or `else` statements
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```js
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assert(!/else/g.test(code) || !/if/g.test(code));
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```
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You should have at least 3 `break` statements
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```js
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assert(code.match(/break/g).length > 2);
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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 caseInSwitch(val) {
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var answer = "";
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// Only change code below this line
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// Only change code above this line
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return answer;
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}
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caseInSwitch(1);
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```
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# --solutions--
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```js
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function caseInSwitch(val) {
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var answer = "";
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switch(val) {
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case 1:
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answer = "alpha";
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break;
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case 2:
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answer = "beta";
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break;
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case 3:
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answer = "gamma";
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break;
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case 4:
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answer = "delta";
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}
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return answer;
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}
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```
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