How to get the last 2 digits of a number in JavaScript

In this tutorial, we will learn two different ways to get the last 2 digits of a number in JavaScript.

In JavaScript, strings are the sequence of characters, where the index of the first character is 0, the second character is 1, third character is 3 and last character index is string.length-1 etc.

Get the last 2 digits of a number

To get the last 2 digits of a number, first we need to convert the number to a string and call the slice() method on a string by passing the -2 as an argument. Then convert the string back to a number.

Where negative index -2 extracts the last two characters from a string, that is same as string.length-2.

Here is an example:

const id = 2345;

const lastDigit = String(id).slice(-2);
console.log(Number(lastDigit));

Output:

45

In the example above, the String() and Number() functions are used to convert the string to a number or vice versa.

Alternatively, we can use the substring() method in JavaScript, to access the last 2 digits of a number in JavaScript.

Here is an example:

const id = 2345;
// conveting the number to string
const strId = String(id);

const lastDigit = strId.substring(strId.length-2);
console.log(Number(lastDigit));

Output:

45

The substring() method in JavaScript returns the part of a string between the start and end indexes.

If only start index is provided it begins extraction from that index upto to the end of a string.