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---
id: 69306364df283fcaff2e1ada
title: "Challenge 149: vOwElcAsE"
challengeType: 28
dashedName: challenge-149
---
# --description--
Given a string, return a new string where all vowels are converted to uppercase and all other alphabetical characters are converted to lowercase.
- Vowels are `"a"`, `"e"`, `"i"`, `"o"`, and `"u"` in any case.
- Non-alphabetical characters should remain unchanged.
# --hints--
`vowelCase("vowelcase")` should return `"vOwElcAsE"`.
```js
assert.equal(vowelCase("vowelcase"), "vOwElcAsE");
```
`vowelCase("coding is fun")` should return `"cOdIng Is fUn"`.
```js
assert.equal(vowelCase("coding is fun"), "cOdIng Is fUn");
```
`vowelCase("HELLO, world!")` should return `"hEllO, wOrld!"`.
```js
assert.equal(vowelCase("HELLO, world!"), "hEllO, wOrld!");
```
`vowelCase("git cherry-pick")` should return `"gIt chErry-pIck"`.
```js
assert.equal(vowelCase("git cherry-pick"), "gIt chErry-pIck");
```
`vowelCase("HEAD~1")` should return `"hEAd~1"`.
```js
assert.equal(vowelCase("HEAD~1"), "hEAd~1");
```
# --seed--
## --seed-contents--
```js
function vowelCase(str) {
return str;
}
```
# --solutions--
```js
function vowelCase(str) {
const vowels = "aeiouAEIOU";
let result = "";
for (let char of str) {
if (vowels.includes(char)) {
result += char.toUpperCase();
} else if (/[a-zA-Z]/.test(char)) {
result += char.toLowerCase();
} else {
result += char;
}
}
return result;
}
```