# How to round double or float values to 2 decimal points

Sometimes while working with double and floats, we need to round them to specific decimal points for calculation. For example, stores round final price to 2 decimal places with half-up rounding mode.

Example #1

Input : 12

output : 12.00

Example #2

Input: 18.888

output : 18.89

### 1. This example using console input with double

```import java.text.DecimalFormat;
import java.util.Scanner;

public class Hello {
private static DecimalFormat decimalFormat = new DecimalFormat(".00");

public static void main(String ar[]) {
Scanner in = new Scanner(System.in);
double number = in.nextDouble();
double roundOff = (double) Math.round(number * 100) / 100;
String ns = decimalFormat.format(roundOff);
System.out.println("Round off number up to 2 decimal place : " + ns);
}
}
```

Outputs

Test #1

Round off number up to 2 decimal place : 12.00

Test #2

Round off number up to 2 decimal place : 18.89

### 2.  Using float variable

```import java.text.DecimalFormat;

public class Hello {
private static DecimalFormat decimalFormat = new DecimalFormat(".00");

public static void main(String ar[]) {

float number = 24.989f;
float roundOff = (float) Math.round(number * 100) / 100;
String ns = decimalFormat.format(roundOff);
System.out.println("Round off number up to 2 decimal place : " + ns);
}
}```

### A.  Formula of example is to round of up to 2 decimal points

Round off

`double roundOff = (double) Math.round(number * 100) / 100;`

Formate

`private static DecimalFormat decimalFormat = new DecimalFormat(".00");`

### B. Formula of example is to round of up to 3 decimal points

Round off

`double roundOff = (double) Math.round(number * 1000) / 1000;`

Formate

`private static DecimalFormat decimalFormat = new DecimalFormat(".000");`

Uses : Sometimes in project we needed show pricing in \$189.00 or ₹123.00 format.

It can be also interview question for Java and android developers.

## 1 thought on “How to round double or float values to 2 decimal points”

1. Thank you Rohit! This was very helpful.