javascript

reverseString()

Parameters: str (type: string)

The string (str) that should be reversed

Returns: Returns the input string reversed in character order

The reverseString function takes a string as input and returns the string in reversed order. It employs the JavaScript built-in functions such as .split(), .reverse(), and .join().

String
Array methods
Built-in JavaScript functions
Data manipulation
Easy dificulty

Developing a JavaScript Function for Reversing Strings

Hello Programmer, welcome to this blog post. Today, we will be exploring the steps to create a 'reverse-string' function in JavaScript. It's a fundamental concept that can be handy in various coding situations. No bells, no whistles, just the how-to. Be sure to stick around to end to get the most out of it. Enjoy evaluating and feel free to get your hands on the keyboard!

Step 1: Understanding the Problem

Start by understanding the problem at hand. We need to create a function that can reverse a string. This means if we input 'hello', we should get 'olleh'.

javascript
let str = 'hello';
// expected output is 'olleh'

Step 2: Initialise the Function and the String Parameter

Next, let's start to write our function. We will call it 'reverseString' and it will take one parameter 'str' which is the string we want to reverse.

javascript
function reverseString(str) {
  // Our code will go here
}

Step 3: String Reversal Method

JavaScript has built-in methods we can use to solve this problem. We use the split('') method to convert our string into an array, reverse() to reverse the array, and then join('') to join the array back into a string.

javascript
function reverseString(str) {
  return str.split('').reverse().join('');
}

Step 4: Testing the Function

Let's test out the function with a string to see if we get the reverse.

javascript
console.log(reverseString('hello'));
// logs: olleh

Conclusion: Full Implementation

So we can see, our 'reverseString' function successfully reverses any string we pass as an argument. Here's the complete function:

javascript
function reverseString(str) {
  return str.split('').reverse().join('');
}
console.log(reverseString('hello')); // logs: olleh

Learn function in:

String Reversal

This function reverses the order of characters in a string

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Mathematical principle

This function relies on the principle of iteration. In a simple form, iteration is the repetition of a process in order to achieve specific outcome. In this scenario, we're sequentially accessing characters from the end towards the start.

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