---
id: 56533eb9ac21ba0edf2244e0
title: Replacing If Else Chains with Switch
challengeType: 1
videoUrl: https://scrimba.com/c/c3JE8fy
forumTopicId: 18266
localeTitle: Замена остальных цепей коммутатором
---
## Description
Если у вас есть много вариантов на выбор, оператор switch может быть проще писать, чем многие прикованные if / else if . Следующие: если (val === 1) {
answer = "a";
} else if (val === 2) {
answer = "b";
} else {
answer = "c";
}
можно заменить на: switch (val) {
Дело 1:
answer = "a";
ломать;
случай 2:
answer = "b";
ломать;
по умолчанию:
answer = "c";
}
## Instructions
Измените прикованные инструкции if / else if оператор switch .
## Tests
```yml
tests:
- text: You should not use any else statements anywhere in the editor
testString: assert(!/else/g.test(code));
- text: You should not use any if statements anywhere in the editor
testString: assert(!/if/g.test(code));
- text: You should have at least four break statements
testString: assert(code.match(/break/g).length >= 4);
- text: chainToSwitch("bob") should be "Marley"
testString: assert(chainToSwitch("bob") === "Marley");
- text: chainToSwitch(42) should be "The Answer"
testString: assert(chainToSwitch(42) === "The Answer");
- text: 'chainToSwitch(1) should be "There is no #1"'
testString: 'assert(chainToSwitch(1) === "There is no #1");'
- text: chainToSwitch(99) should be "Missed me by this much!"
testString: assert(chainToSwitch(99) === "Missed me by this much!");
- text: chainToSwitch(7) should be "Ate Nine"
testString: assert(chainToSwitch(7) === "Ate Nine");
- text: chainToSwitch("John") should be "" (empty string)
testString: assert(chainToSwitch("John") === "");
- text: chainToSwitch(156) should be "" (empty string)
testString: assert(chainToSwitch(156) === "");
```
## Challenge Seed
```js
function chainToSwitch(val) {
var answer = "";
// Only change code below this line
if (val === "bob") {
answer = "Marley";
} else if (val === 42) {
answer = "The Answer";
} else if (val === 1) {
answer = "There is no #1";
} else if (val === 99) {
answer = "Missed me by this much!";
} else if (val === 7) {
answer = "Ate Nine";
}
// Only change code above this line
return answer;
}
// Change this value to test
chainToSwitch(7);
```
## Solution
```js
function chainToSwitch(val) {
var answer = "";
switch(val) {
case "bob":
answer = "Marley";
break;
case 42:
answer = "The Answer";
break;
case 1:
answer = "There is no #1";
break;
case 99:
answer = "Missed me by this much!";
break;
case 7:
answer = "Ate Nine";
}
return answer;
}
```