Java Math.signum() method

The java.lang.Math.signum () is used to find the sign of a given value.

Syntax

public static double signum(double x)
public static float signum(float x)

Parameter

Return

If the argument is positive or negative Zero, this method will return Zero.
If the argument is positive value, this method will return Positive 1.
If the argument is Negative value, this method will return Negative 1.
If the argument is NaN, this method will return NaN.

Example 1

public class SignumExample1
{
    public static void main(String[] args) 
    {
        double a= 82.7;
        System.out.println(Math.signum(a));
    }
}

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Output:

1.0

Example 2

public class SignumExample2
{
    public static void main(String[] args) 
    {
        double a= -48.6;
        System.out.println(Math.signum(a));
    }
}

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Output:

-1.0

Example 3

public class SignumExample3
{
    public static void main(String[] args) 
    {
       float a= 0.0f;
        System.out.println(Math.signum(a));
    }
}

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Output:

0.0

Example 4

public class SignumExample4
{
    public static void main(String[] args) 
    {
        double a= 0.0/0;
        System.out.println(Math.signum(a));
    }
}

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Output: