How to Round Up a Double to 2 Decimal Places in Java?

Round Up to 2 Decimal Places in Java

In Java, rounding up a double value to 2 decimal places can be achieved using the Math.round() method. However, simply multiplying and dividing the value by 100 doesn't always provide the desired results.

Solution:

The correct way to round up a double to 2 decimal places is to use Math.round() along with type casting to ensure that the operation calculates accurately:

In this code, we type cast the result of Math.round(a * 100.0) to a double to preserve the decimal precision. By multiplying a by 100.0, we effectively multiply it by 100, and then dividing it by 100.0 restores the decimal value.

The output of the above code for the given input a will be 123.14, which meets the requirement of rounding up to 2 decimal places.

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