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85 lines
1.8 KiB
Markdown
85 lines
1.8 KiB
Markdown
---
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id: afcc8d540bea9ea2669306b6
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title: Repeat a String Repeat a String
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challengeType: 1
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forumTopicId: 16041
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dashedName: repeat-a-string-repeat-a-string
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---
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# --description--
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Repeat a given string `str` (first argument) for `num` times (second argument). Return an empty string if `num` is not a positive number. For the purpose of this challenge, do _not_ use the built-in `.repeat()` method.
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# --hints--
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`repeatStringNumTimes("*", 3)` should return the string `***`.
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```js
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assert.strictEqual(repeatStringNumTimes('*', 3), '***');
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```
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`repeatStringNumTimes("abc", 3)` should return the string `abcabcabc`.
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```js
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assert.strictEqual(repeatStringNumTimes('abc', 3), 'abcabcabc');
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```
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`repeatStringNumTimes("abc", 4)` should return the string `abcabcabcabc`.
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```js
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assert.strictEqual(repeatStringNumTimes('abc', 4), 'abcabcabcabc');
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```
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`repeatStringNumTimes("abc", 1)` should return the string `abc`.
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```js
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assert.strictEqual(repeatStringNumTimes('abc', 1), 'abc');
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```
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`repeatStringNumTimes("*", 8)` should return the string `********`.
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```js
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assert.strictEqual(repeatStringNumTimes('*', 8), '********');
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```
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`repeatStringNumTimes("abc", -2)` should return an empty string (`""`).
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```js
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assert.isEmpty(repeatStringNumTimes('abc', -2));
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```
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The built-in `repeat()` method should not be used.
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```js
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assert.notMatch(__helpers.removeJSComments(code), /\.repeat/g);
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```
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`repeatStringNumTimes("abc", 0)` should return `""`.
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```js
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assert.isEmpty(repeatStringNumTimes('abc', 0));
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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 repeatStringNumTimes(str, num) {
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return str;
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}
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repeatStringNumTimes('abc', 3);
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```
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# --solutions--
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```js
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function repeatStringNumTimes(str, num) {
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if (num < 1) return '';
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return num === 1 ? str : str + repeatStringNumTimes(str, num - 1);
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}
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repeatStringNumTimes('abc', 3);
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```
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