BigDecimal negate() Function in Java Improve Improve Like Article Like Save Share Report The java.math.BigDecimal.negate() method returns a BigDecimal whose value is the negated value of the BigDecimal with which it is used. Syntax: public BigDecimal negate() Parameters: The method does not take any parameters . Return Value: This method returns the negative value of the BigDecimal object and whose scale is this.scale(). Below programs will illustrate the use of java.math.BigDecimal.negate() function: Program 1 : // Java program to demonstrate negate() method import java.math.*; public class GFG { public static void main(String[] args) { // Create a BigDecimal object BigDecimal num; // Assign value to num num = new BigDecimal("4743"); System.out.println( "Negated value is " + num.negate() ); } } Output: Negated value is -4743 Program 2: // Java program to demonstrate negate() method import java.math.*; public class GFG { public static void main(String[] args) { // Create a BigDecimal object BigDecimal num; // Assign value to num num = new BigDecimal("-9674283517.97"); System.out.println( "Negated value is " + num.negate() ); } } Output: Negated value is 9674283517.97 The java.math.BigDecimal.negate(MathContext mc) method returns a BigDecimal whose value is the negated value of it, i.e. obtained by rounding off according to the precision settings specified by the object of MathContext class. Syntax: public BigDecimal negate(MathContext mc) Parameters: The method accepts only one parameter mc of MathContext class object which specifies the precision settings for rounding off the BigDecimal. Return Value: This method returns the negated value of the object which is rounded as per the precision settings. Exception: The method might throw ArithmeticException if the result obtained is not exact but the rounding mode is UNNECESSARY. Below programs will illustrate the use of java.math.BigDecimal.negate(MathContext mc) method: Program 1 // Java program to demonstrate negate(MathContext mc) method import java.math.*; public class GFG { public static void main(String[] args) { // create 2 BigDecimal objects BigDecimal num, negv; MathContext mc = new MathContext(4); // 4 precision // assign value to num num = new BigDecimal("78.6714"); // assign negate value of num to negv using mc negv = num.negate(mc); System.out.println("Negated value, rounded to 4"+ " precision " + negv); } } Output: Negated value, rounded to 4 precision -78.67 Program 2 // Java program to demonstrate negate(MathContext mc) method import java.math.*; public class GFG { public static void main(String[] args) { // create 2 BigDecimal objects BigDecimal num, negv; MathContext mc = new MathContext(12); // 12 precision // assign value to num num = new BigDecimal("-178901456.68431"); // assign negate value of num to negv using mc negv = num.negate(mc); System.out.println("Negated value, rounded to 12 "+ "precision " + negv); } } Output: Negated value, rounded to 12 precision 178901456.684 Reference: https://docs.oracle.com/javase/7/docs/api/java/math/BigDecimal.html#negate() Last Updated : 04 Dec, 2018 Like Article Save Article Previous BigDecimal shortValueExact() Method in Java Next MathContext getPrecision() Method in Java Share your thoughts in the comments Add Your Comment Please Login to comment...