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

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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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Jaspreet Singh Ghuman

Jaspreet Singh Ghuman

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