bigdecimal +=

BigDecimal is a Java class that provides arbitrary-precision decimal arithmetic. It is used when precise decimal calculations are required, and the normal floating-point arithmetic cannot provide accurate results.

To use BigDecimal in Java, you need to import the class:

import java.math.BigDecimal;

Then, you can create BigDecimal objects by passing in the desired value as a string or using other constructors:

BigDecimal number1 = new BigDecimal("10.5");
BigDecimal number2 = new BigDecimal(20);

Once you have created BigDecimal objects, you can perform various arithmetic operations like addition, subtraction, multiplication, and division using the methods provided by the BigDecimal class.

For example:

BigDecimal result = number1.add(number2); // addition
BigDecimal result = number1.subtract(number2); // subtraction
BigDecimal result = number1.multiply(number2); // multiplication
BigDecimal result = number1.divide(number2); // division

Remember to use the appropriate methods based on your requirements, as BigDecimal objects are immutable and the methods return a new BigDecimal object with the result.

I hope this answers your question! Let me know if you have any more doubts.