Get last n characters of a string in JavaScript

This post will discuss how to get the last n characters of a string in JavaScript.

There are several methods to get the last n characters from a string using JavaScript native methods substring() and slice().

1. Using `String.prototype.substring()` function

The substring() method returns the part of the string between the start and end indexes, or at the end of the string. Following is a simple example demonstrating the usage of substring() to get the last n characters from the string:

const str = 'ECMAScript 2015';

const n = 4;

console.log(str.substring(str.length - n));

Output: 2015

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2. Using `String.prototype.slice()` function

Another plausible way to get the last n characters from the string is using the slice() method. The slice() method extracts a section of string and returns it as a new string.

const str = 'ECMAScript 2015';

const n = 4;

console.log(str.slice(str.length - n));

Output: 2015

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The following example uses slice() with negative indexes.

const str = 'ECMAScript 2015';

const n = 4;

console.log(str.slice(-n));

Output: 2015

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You can also use the substr() method in a similar manner, but it is considered a legacy function and may be removed in the future.

That’s all about getting the last n characters of a string in JavaScript.

Get last n characters of a string in JavaScript

1. Using String.prototype.substring() function

2. Using String.prototype.slice() function

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1. Using `String.prototype.substring()` function

2. Using `String.prototype.slice()` function