Recursively Print All Permutations Of A String Javascript

Are you looking to dive into the exciting world of string permutations in Javascript? Well, you're in luck! In this guide, we'll walk through how to recursively print all permutations of a string using Javascript.

Firstly, let's clarify what a permutation is. In simple terms, a permutation of a string is a rearrangement of its characters. For example, the permutations of the word "ABC" would be "ABC," "ACB," "BAC," "BCA," "CAB," and "CBA."

To achieve this in Javascript, we can use a recursive approach. Recursion is a method in programming where a function calls itself in order to solve a problem. It's a powerful technique that can be particularly useful for generating permutations.

Here's a simple recursive function in Javascript that prints all permutations of a given string:

function permuteString(inputString, current = '') {
  if (!inputString) {
      console.log(current);
  } else {
      for (let i = 0; i < inputString.length; i++) {
          const newString = inputString.substring(0, i) + inputString.substring(i + 1);
          permuteString(newString, current + inputString[i]);
      }
  }
}

const input = 'ABC';
permuteString(input);

Let's break down how this function works. The `permuteString` function takes two parameters: `inputString` (the string we want to permute) and `current` (the current permutation being built).

In the function, we check if the `inputString` is empty. If it is, we've reached a valid permutation, so we log it to the console. Otherwise, we iterate through the characters of the input string. For each character, we create a new string that excludes that character and recursively call `permuteString` with the new string and the concatenation of the current character to the existing `current` string.

By running the provided code with the input string 'ABC,' you'll see all possible permutations of 'ABC' printed to the console.

Remember, recursion can be a complex concept to grasp initially, but with practice and experimentation, you'll soon become comfortable using it to solve various programming challenges.

So go ahead, give this code a try with different input strings, and have fun exploring the fascinating world of string permutations in Javascript!