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---
id: 5a23c84252665b21eecc803f
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title: Soma dos dígitos de um inteiro
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challengeType: 5
forumTopicId: 302331
dashedName: sum-digits-of-an-integer
---
# --description--
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Escreva uma função que receba uma string como parâmetro. Essa string representa um número que pode estar em qualquer base (inferior a 37) e que retorne a soma de seus dígitos.
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< ul >
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< li > < b > 1< / b > < sub > 10< / sub > soma < b > 1< / b > < / li >
< li > < b > 1234< / b > < sub > 10< / sub > soma < b > 10< / b > < / li >
< li > < b > fe< / b > < sub > 16< / sub > soma < b > 29< / b > < / li >
< li > < b > f0e< / b > < sub > 16< / sub > soma < b > 29< / b > < / li >
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< / ul >
# --hints--
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`sumDigits` deve ser uma função.
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```js
assert(typeof sumDigits == 'function');
```
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`sumDigits("1")` deve retornar um número.
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```js
assert(typeof sumDigits('1') == 'number');
```
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`sumDigits("1")` deve retornar `1` .
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```js
assert.equal(sumDigits('1'), 1);
```
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`sumDigits("12345")` deve retornar `15` .
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```js
assert.equal(sumDigits('12345'), 15);
```
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`sumDigits("254")` deve retornar `11` .
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```js
assert.equal(sumDigits('254'), 11);
```
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`sumDigits("fe")` deve retornar `29` .
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```js
assert.equal(sumDigits('fe'), 29);
```
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`sumDigits("f0e")` deve retornar `29` .
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```js
assert.equal(sumDigits('f0e'), 29);
```
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`sumDigits("999ABCXYZ")` deve retornar `162` .
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```js
assert.equal(sumDigits('999ABCXYZ'), 162);
```
# --seed--
## --seed-contents--
```js
function sumDigits(n) {
}
```
# --solutions--
```js
function sumDigits(n) {
n += '';
for (var s = 0, i = 0, e = n.length; i < e ; i + = 1 )
s += parseInt(n.charAt(i), 36);
return s;
}
```