chore: import upstream snapshot with attribution

curriculum/challenges/english/blocks/basic-algorithm-scripting/afcc8d540bea9ea2669306b6.md

@@ -0,0 +1,84 @@
+---
+id: afcc8d540bea9ea2669306b6
+title: Repeat a String Repeat a String
+challengeType: 1
+forumTopicId: 16041
+dashedName: 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 `***`.
+
+```js
+assert.strictEqual(repeatStringNumTimes('*', 3), '***');
+```
+
+`repeatStringNumTimes("abc", 3)` should return the string `abcabcabc`.
+
+```js
+assert.strictEqual(repeatStringNumTimes('abc', 3), 'abcabcabc');
+```
+
+`repeatStringNumTimes("abc", 4)` should return the string `abcabcabcabc`.
+
+```js
+assert.strictEqual(repeatStringNumTimes('abc', 4), 'abcabcabcabc');
+```
+
+`repeatStringNumTimes("abc", 1)` should return the string `abc`.
+
+```js
+assert.strictEqual(repeatStringNumTimes('abc', 1), 'abc');
+```
+
+`repeatStringNumTimes("*", 8)` should return the string `********`.
+
+```js
+assert.strictEqual(repeatStringNumTimes('*', 8), '********');
+```
+
+`repeatStringNumTimes("abc", -2)` should return an empty string (`""`).
+
+```js
+assert.isEmpty(repeatStringNumTimes('abc', -2));
+```
+
+The built-in `repeat()` method should not be used.
+
+```js
+assert.notMatch(__helpers.removeJSComments(code), /\.repeat/g);
+```
+
+`repeatStringNumTimes("abc", 0)` should return `""`.
+
+```js
+assert.isEmpty(repeatStringNumTimes('abc', 0));
+```
+
+# --seed--
+
+## --seed-contents--
+
+```js
+function repeatStringNumTimes(str, num) {
+  return str;
+}
+
+repeatStringNumTimes('abc', 3);
+```
+
+# --solutions--
+
+```js
+function repeatStringNumTimes(str, num) {
+  if (num < 1) return '';
+  return num === 1 ? str : str + repeatStringNumTimes(str, num - 1);
+}
+
+repeatStringNumTimes('abc', 3);
+```