Algorithm-Repeat-a-String-Repeat-a-String.md

Explanation:

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.

Hint: 1

You can't edit strings, you will need to create a variable to store the new string.

Hint: 2

Create a loop to repeat the code as many times as needed.

Hint: 3

Make the variable created store the current value and append the word to it.

Spoiler Alert!

Solution ahead!

Code Solution:

####First Solution

function repeat(str, num) {
  var accumulatedStr = '';

  while (num > 0) {
    accumulatedStr += str;
    num--;
  }

  return accumulatedStr;
}

####Second Solution

function repeat(str, num) {
  var newstr = [];
  for (var i = 0; i < num; i++) {
    newstr.push(str);
  }
  return newstr.join('');
}

repeat("abc", 3);

####Third Solution (using Recursion)

function repeat(str, num) {
  if(num < 0)
    return "";
  if(num === 1)
    return str;
  else
    return str + repeat(str, num - 1);
}

####Fourth Solution (Declarative approach)

function repeat(str, num) {
  return num >= 0 ? str.repeat(num) : "";
}

repeat("abc", 3);

Code Explanation:

####First and Second solutions

• Create a variable to store the repeated word.
• Use a while loop or for loop to repeat code as many times as needed according to num
• 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.
• At the end of the loop, return the variable for the repeated word.

####Third solution (using recursiveness)

• We check if num is a negative and return an empty string if true.
• Then we check if it's equal to 1 and in that case we return the string itself.
• 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.

####Fourth solution (Declarative approach)

• This solution is somewhat similar to the third solution, except it uses the ternary operator form of the if statement.
• The conditional's first statement (in this case our checking whether num is a negative number) is followed by ?.
• The next statement is what to execute, or in our case return, when the condition evaluates to true.
• The final statement is what to execute, or again in our case return, if the initial statement evaluates to false.
• In between the two statements for true and false, you use a colon : to indicate the separation.

Credits:

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