Get the last 3 digits of a number in Java

In this tutorial, we are going to learn about how to get the last 3 digits of a number in Java.

Note: Strings are sequence of characters, where indexes are zero-based. The last character is in position 0, the second in 1, and index of a last character is string.length()-1 etc.

Get the last 3 digits of a number

To get the last 3 digits of a number, convert the number to a string and call the substring() method on it, by passing the string.length()-2 as a argument.

The substring() method returns the last 3 character of a string then convert the result back to a number to get the last 2 digits.

Note: The string.length()-3 givens index of a third character from the end.

Here is an example:

int price = 421039;
String priceStr = Integer.toString(price);
int lastThreeIndex = priceStr.length()-3; // 3nd character index from last
int lastThreeDigits = Integer.parseInt(priceStr.substring(lastThreeIndex));

System.out.println(lastThreeDigits);

Output:

039

In the example above, on the first step we have converted the number to a string using the Integer.toString() method.

We have passed the priceStr.length()-3 as argument to the substring() method, so it returns the last 3 characters.

The last step, we used the Integer.parseInt() method to convert it back to a number.

or You can get the last 3 digits of a number, by dividing the number by 1000 using modulo operator %.

Here is an example:

int price = 421039;
lastThreeDigits = price % 1000;

System.out.println(lastThreeDigits);

References

• Strings in Java

• Integers in Java