freeCodeCamp/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/repeat-a-string-repeat-a-string.md

id	title	challengeType	forumTopicId	dashedName
afcc8d540bea9ea2669306b6	Repeat a String Repeat a String	1	16041	repeat-a-string-repeat-a-string

--description--

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.

--hints--

repeatStringNumTimes("*", 3) should return the string ***.

assert.strictEqual(repeatStringNumTimes('*', 3), '***');

repeatStringNumTimes("abc", 3) should return the string abcabcabc.

assert.strictEqual(repeatStringNumTimes('abc', 3), 'abcabcabc');

repeatStringNumTimes("abc", 4) should return the string abcabcabcabc.

assert.strictEqual(repeatStringNumTimes('abc', 4), 'abcabcabcabc');

repeatStringNumTimes("abc", 1) should return the string abc.

assert.strictEqual(repeatStringNumTimes('abc', 1), 'abc');

repeatStringNumTimes("*", 8) should return the string ********.

assert.strictEqual(repeatStringNumTimes('*', 8), '********');

repeatStringNumTimes("abc", -2) should return an empty string ("").

assert.isEmpty(repeatStringNumTimes('abc', -2));

The built-in repeat() method should not be used.

assert.notMatch(__helpers.removeJSComments(code), /\.repeat/g);

repeatStringNumTimes("abc", 0) should return "".

assert.isEmpty(repeatStringNumTimes('abc', 0));

--seed--

--seed-contents--

function repeatStringNumTimes(str, num) {
  return str;
}

repeatStringNumTimes('abc', 3);

--solutions--

function repeatStringNumTimes(str, num) {
  if (num < 1) return '';
  return num === 1 ? str : str + repeatStringNumTimes(str, num - 1);
}

repeatStringNumTimes('abc', 3);