How To Slice String From The End In Javascript Duplicate

When working with strings in JavaScript, there could be instances where you need to extract a specific portion of text from the end of a string. This process of slicing a string from the end can be really helpful in various programming scenarios. In this guide, I'll walk you through how to effectively slice a string from the end using JavaScript.

To begin, let's first understand the syntax for slicing a string from the end in JavaScript. You can achieve this by using the `substring()` method along with the length of the string. Here's an example to illustrate this:

let originalString = 'Hello, World!';
let slicedString = originalString.substring(originalString.length - 5);
console.log(slicedString); // Output: World!

In the example above, we start by defining our original string, 'Hello, World!'. Then, we use the `substring()` method with the formula `(originalString.length - N)` to extract the last `N` characters from the string. In this case, we sliced the last 5 characters, resulting in 'World!' being stored in the `slicedString` variable.

If you want to dynamically slice a specific number of characters from the end of a string, you can create a reusable function like this:

function sliceStringFromEnd(originalStr, numChars) {
    return originalStr.substring(originalStr.length - numChars);
}

let originalText = 'Working with strings is fun!';
let slicedText = sliceStringFromEnd(originalText, 9);
console.log(slicedText); // Output: fun!

In the above code snippet, we define a function `sliceStringFromEnd()` that takes two parameters: the original string (`originalStr`) and the number of characters to slice from the end (`numChars`). By utilizing this function, you can easily slice any desired number of characters from the end of a given string.

Another method you can use to achieve the same result is by employing the `slice()` method in JavaScript. Here's an example demonstrating how you can slice a string from the end using the `slice()` method:

let sampleText = 'Tech is awesome!';
let resultText = sampleText.slice(-7);
console.log(resultText); // Output: awesome!

In this snippet, we utilize the `slice(-N)` format, where the negative index indicates counting characters from the end of the string. Therefore, `sampleText.slice(-7)` retrieves the last 7 characters from the string 'Tech is awesome!', resulting in 'awesome!' being returned.

By implementing these methods, you can easily slice strings from the end of your text in JavaScript, providing you with valuable flexibility and control when working with string operations in your programming projects. Utilize these techniques to enhance your coding skills and tackle various string manipulation tasks effectively.