Remove the Last 2,3,4, N Characters from a String in JavaScript

In JavaScript, there are various modern and traditional approaches to manipulating strings. In this tutorial, we will show you how to remove the last 2, 3, 4, and N characters from a string in javascript by w3school.

How to Remove the Last 2,3,4, N Characters from a String in JavaScript

Using the following modern and traditional approach, you can remove the last 2,3,4, and N characters from a string in JavaScript by w3school:

• Approach 1: Using slice() Method
• Approach 2: Using substring() Method
• Approach 3: Using replace() with Regular Expression

Approach 1: Using slice() Method

The slice() method is a convenient way to remove a part of a string by specified start index to the end index with the given string.

To remove the last 2,3,4 and N characters, you can use negative indices:

// Original string
let givenStr = "Hello, World!";

// Remove the last 2 characters
let removedLast2 = givenStr.slice(0, -2);

// Remove the last 3 characters
let removedLast3 = givenStr.slice(0, -3);

// Remove the last 4 characters
let removedLast4 = givenStr.slice(0, -4);

// Remove the last N characters
let removedLast4 = givenStr.slice(0, -n);

console.log("Given String:", givenStr);
console.log("Removed Last 2:", givenStr);
console.log("Removed Last 3:", givenStr);
console.log("Removed Last 4:", givenStr);

Approach 2: Using substring() Method

The substring() method allows you to remove a part of a string based on specified start index to the end index with the given string.

To remove the last 2,3,4 and N characters, you can use this method along with the string’s length:

// Remove last 2 characters
let str1 = "example";
let result1 = str1.substring(0, str1.length - 2);

// Remove last 3 characters
let str2 = "hello";
let result2 = str2.substring(0, str2.length - 3);

// Remove last 4 characters
let str3 = "world";
let result3 = str3.substring(0, str3.length - 4);

Approach 3: Using replace() with Regular Expression

A regular expression and replace() method can also be to remove the last 2,3,4 and N characters from a string.

Here is an example of how to remove the last 2,3,4 N character from a string in JavaScript using regular expression:

// Original string
let originalString = "Hello, World!";

// Remove the last 2 characters
let removedLast2 = originalString.replace(/.{2}$/, '');

// Remove the last 3 characters
let removedLast3 = originalString.replace(/.{3}$/, '');

// Remove the last 4 characters
let removedLast4 = originalString.replace(/.{4}$/, '');

console.log("Original:", originalString);
console.log("Removed Last 2:", removedLast2);
console.log("Removed Last 3:", removedLast3);
console.log("Removed Last 4:", removedLast4);

Conclusion

In this tutorial, you have learned 3 approaches to removing the 2,3,4 and N last characters from a string in JavaScript. Choose the approach that fits your preference and coding style.

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