# How do you multiply to BigDecimal?

## How do you multiply to BigDecimal?

Use the multiply() method to multiply one BigDecimal to another in Java. This method returns a BigDecimal whose value is (this × multiplicand), and whose scale is (this. scale() + multiplicand.

**How do you multiply int with BigDecimal?**

BigDecimal amount = new BigDecimal(BigInteger. ZERO, 2); Second, We convert quantity (int) to BigDecimal Object. Finally, we multiply two BigDecimal numbers (productPrice*quantity) using BigDecimal.

### What is RoundingMode in BigDecimal Java?

setScale(int newScale, RoundingMode roundingMode) returns a BigDecimal whose scale is the specified value, and whose unscaled value is determined by multiplying or dividing this BigDecimal’s unscaled value by the appropriate power of ten to maintain its overall value.

**What is BigDecimal value in Java?**

A BigDecimal consists of an arbitrary precision integer unscaled value and a 32-bit integer scale. If zero or positive, the scale is the number of digits to the right of the decimal point. If negative, the unscaled value of the number is multiplied by ten to the power of the negation of the scale.

#### Why use BigDecimal instead of double?

A BigDecimal is an exact way of representing numbers. A Double has a certain precision. Working with doubles of various magnitudes (say d1=1000.0 and d2=0.001 ) could result in the 0.001 being dropped alltogether when summing as the difference in magnitude is so large. With BigDecimal this would not happen.

**How do you round BigDecimal?**

You can use setScale() to reduce the number of fractional digits to zero. Assuming value holds the value to be rounded: BigDecimal scaled = value. setScale(0, RoundingMode.

## What is MathContext in Java?

The java. math. MathContext class provides immutable objects which encapsulate the context settings and describes certain rules for numerical operators, such as those implemented by the BigDecimal class.

**How do I add two BigDecimals?**

math. BigDecimal. add(BigDecimal val) is used to calculate the Arithmetic sum of two BigDecimals. This method is used to find arithmetic addition of large numbers of range much greater than the range of largest data type double of Java without compromising with the precision of the result.

### What is scale and precision in BigDecimal?

Java BigDecimal Precision and Scale By Definition, precision indicates the length of arbitrary precision integer whereas scale means the number of digits to the right of the decimal point. For example if we have a number “100.25” then precision is 5 because we need five digits to write down this number and scale is 2.

**Why use BigDecimal instead of double in Java?**

#### How do you sum BigDecimal?

**What is the difference between BigDecimal and BigInteger in Java?**

The main difference between the BigInteger and BigDecimal is that BigInteger supports arbitrary-precision integers and BigDecimal is for arbitrary-precision fixed-point numbers.