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BigDecimal signum() Method in Java

  • Last Updated : 04 Dec, 2018

The java.math.BigDecimal.signum() is an inbuilt method in Java that returns the signum function of this BigDecimal. The sign function or signum function is an odd mathematical function that extracts the sign of a real number. In mathematical expressions, the sign function is often represented as sgn.

Syntax:

public int signum()

Parameters: This method does not accepts any parameter.

Return value: This method can return three types of values:

  • -1 if this BigDecimal < 0
  • 0 if this BigDecimal = 0
  • 1 if this BigDecimal is > 0

Below program illustrates the working of the above mentioned method:



Program 1:




// Program to demonstrate signum() method of BigDecimal 
  
import java.math.*;
  
public class Gfg {
  
    public static void main(String[] args)
    {
  
        BigDecimal b1 = new BigDecimal("12743");
        BigDecimal b2 = new BigDecimal("0");
        BigDecimal b3 = new BigDecimal("-4512");
  
        // Assigning the signum values of  BigDecimal objects b1, b2, b3
        // to  int objects i1, i2, i3 respectively
        int i1 = b1.signum();
        int i2 = b2.signum();
        int i3 = b3.signum();
  
        // Printing i1, i2, i3 values
        System.out.println("Signum function on " + b1 + " is " + i1);
        System.out.println("Signum function on " + b2 + " is " + i2);
        System.out.println("Signum function on " + b3 + " is " + i3);
    }
}
Output:
Signum function on 12743 is 1
Signum function on 0 is 0
Signum function on -4512 is -1

Program 2:




// Program to demonstrate signum() method of BigDecimal 
  
import java.math.*;
  
public class Gfg {
  
    public static void main(String[] args)
    {
  
        BigDecimal b1 = new BigDecimal("17845452743");
        BigDecimal b2 = new BigDecimal("000");
        BigDecimal b3 = new BigDecimal("-444512");
  
        // Assigning the signum values of  BigDecimal objects b1, b2, b3
        // to  int objects i1, i2, i3 respectively
        int i1 = b1.signum();
        int i2 = b2.signum();
        int i3 = b3.signum();
  
        // Printing i1, i2, i3 values
        System.out.println("Signum function on " + b1 + " is " + i1);
        System.out.println("Signum function on " + b2 + " is " + i2);
        System.out.println("Signum function on " + b3 + " is " + i3);
    }
}
Output:
Signum function on 17845452743 is 1
Signum function on 0 is 0
Signum function on -444512 is -1

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

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