BigDecimal abs() Method in Java

1. The java.math.BigDecimal.abs() is used to return a BigDecimal whose value is the absolute value of the BigDecimal and whose scale is this.scale().

   Syntax :

   public BigDecimal abs()

   Parameters: The method does not accept any parameters.

   Return Value: Returns a BigDecimal whose value is the absolute value of this BigDecimal scale is this.scale().

   Below programs will illustrate the use of java.math.BigDecimal.abs() method :
   Program 1

   
   

   
   
   

   // Java program to demonstrate abs() method import java.io.*; import java.math.*;    public class GFG {        public static void main(String[] args)     {            // Creating a BigDecimal object         BigDecimal num;            // Assigning value to num         num = new BigDecimal("-51");            // Displaying the result         System.out.println("Absolute value is " + num.abs());     } }
   Output:

   Absolute value is 51
   

   Program 2

   
   

   
   
   

   // Java program to demonstrate abs() method import java.io.*; import java.math.*;    public class GFG {        public static void main(String[] args)     {            // creating a BigDecimal object         BigDecimal num;            // assign value to num         num = new BigDecimal("-63.93471");            System.out.println("Absolute value is " + num.abs());     } }
   Output:

   Absolute value is 63.93471
   

2. The java.math.BigDecimal.abs(MathContext mc) returns a BigDecimal whose value is the absolute value of the BigDecimal obtained by rounding it off according to the precision settings specified by mc, an object of MathContext class.

   Syntax:

   public BigDecimal abs(MathContext mc)

   Parameters : The function accepts only one parameter mc of MathContext class object, which specifies precision settings to be used for rounding off the BigDecimal.

   Return Value: Returns a BigDecimal whose value is the absolute value of this BigDecimal obtained by rounding it off according to the precision settings specified by the object mc.

   Exception : The method throws an ArithmeticException, if the result is inexact but the rounding mode is UNNECESSARY.

   Below programs illustrate the use of java.math.BigDecimal.abs() method with specified MathContext :
   Program 1

   
   

   
   
   

   import java.io.*; import java.math.*;    public class GFG {        public static void main(String[] args)     {            // Create 2 BigDecimal objects         BigDecimal num, absv;            MathContext mc = new MathContext(2);            // Assign value to num         num = new BigDecimal("51.93471");            // Assign absolute value of num to absv rounded          // to 2 precision using mc         absv = num.abs(mc);            System.out.println("Absolute value, rounded to 2 precision is "         + absv);     } }
   Output:

   Absolute value, rounded to 2 precision is 52
   

   Program 2

   
   

   
   
   

   import java.io.*; import java.math.*;    public class GFG {        public static void main(String[] args)     {            // Create 2 BigDecimal objects         BigDecimal num, absv;            MathContext mc = new MathContext(15);            // Assign value to num         num = new BigDecimal("143567812363.93471");            // Assign absolute value of num to absv rounded          // to 15 precision using mc         absv = num.abs(mc);            System.out.println("Absolute value, rounded to 15 precision is "          + absv);     } }
   Output:

   Absolute value, rounded to 15 precision is 143567812363.935
   

Reference: https://docs.oracle.com/javase/7/docs/api/java/math/BigDecimal.html#abs()