116 lines
5.9 KiB
Markdown
116 lines
5.9 KiB
Markdown
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---
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title: Repeat a String Repeat a String
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---
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 Remember to use <a>**`Read-Search-Ask`**</a> if you get stuck. Try to pair program  and write your own code 
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###  Problem Explanation:
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The program is very simple, we have to take a variable and return that variable being repeated certain amount of times. No need to add space or anything, just keep repeating it into one single string.
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#### Relevant Links
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* <a href='https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String' target='_blank' rel='nofollow'>Global String Object</a>
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##  Hint: 1
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You can't edit strings, you will need to create a variable to store the new string.
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> _try to solve the problem now_
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##  Hint: 2
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Create a loop to repeat the code as many times as needed.
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> _try to solve the problem now_
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##  Hint: 3
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Make the variable created store the current value and append the word to it.
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> _try to solve the problem now_
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## Spoiler Alert!
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**Solution ahead!**
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##  Basic Code Solution:
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function repeatStringNumTimes(str, num) {
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var accumulatedStr = '';
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while (num > 0) {
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accumulatedStr += str;
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num--;
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}
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return accumulatedStr;
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}
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 <a href='https://repl.it/CLjU/19' target='_blank' rel='nofollow'>Run Code</a>
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### Code Explanation:
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* Create an empty string variable to store the repeated word.
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* Use a while loop or for loop to repeat code as many times as needed according to `num`
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* Then we just have to add the string to the variable created on step one, and increase or decrease `num` depending on how you set the loop.
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* At the end of the loop, return the variable for the repeated word.
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#### Relevant Links
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* <a>JS while Loop</a>
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* <a href='https://forum.freecodecamp.com/t/javascript-for-loop/14666s-Explained' target='_blank' rel='nofollow'>JS For Loops Explained</a>
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##  Intermediate Code Solution:
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function repeatStringNumTimes(str, num) {
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if(num < 0)
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return "";
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if(num === 1)
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return str;
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else
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return str + repeatStringNumTimes(str, num - 1);
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}
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 <a href='https://repl.it/CLjU/21' target='_blank' rel='nofollow'>Run Code</a>
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### Code Explanation:
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* This solution uses recursion.
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* We check if `num` is negative and return an empty string if true.
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* Then we check if it's equal to 1 and in that case we return the string itself.
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* If not, we add the string to a call of our function with `num` being decreased by 1, which will add another `str` and another.. until eventually `num` is 1\. And return that whole process.
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#### Relevant Links
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* <a href='https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Functions#Recursion' target='_blank' rel='nofollow'>Functions - Recursion</a>
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##  Advanced Code Solution:
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function repeatStringNumTimes(str, num) {
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return num > 0 ? str.repeat(num) : '';
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}
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repeatStringNumTimes("abc", 3);
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 <a href='https://repl.it/CLjU/85' target='_blank' rel='nofollow'>Run Code</a>
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### Code Explanation:
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* This solution takes a declarative approach.
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* It is similar to the third solution, except it uses the ternary operator form of the `if` statement.
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#### Relevant Links
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* <a href='https://forum.freecodecamp.com/t/javascript-ternary-operator/15973' target='_blank' rel='nofollow'>JS Ternary</a>
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##  NOTES FOR CONTRIBUTIONS:
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*  **DO NOT** add solutions that are similar to any existing solutions. If you think it is **_similar but better_**, then try to merge (or replace) the existing similar solution.
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* Add an explanation of your solution.
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* Categorize the solution in one of the following categories — **Basic**, **Intermediate** and **Advanced**. 
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* Please add your username only if you have added any **relevant main contents**. ( **_DO NOT_** _remove any existing usernames_)
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> See  <a href='https://forum.freecodecamp.com/t/algorithm-article-template/14272' target='_blank' rel='nofollow'>**`Wiki Challenge Solution Template`**</a> for reference.
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