Java Math.getExponent() method

The java.lang.Math.getExponent() return the unbiased exponent used in the representation of double or float.

Syntax

public static int getExponent(float x)
public static int getExponent(double x)

Parameter

Return

If the argument is positive or negative double or float value, this method will return the unbiased exponent.
If the argument is NaN or Infinity, this method will return Float.MAX_EXPONENT + 1 or Double.MAX_EXPONENT + 1.
If the argument is Zero, this method will return Float.MIN_EXPONENT - 1 or Double.MIN_EXPONENT - 1.

Example 1

public class GetExponentExample1
{
    public static void main(String[] args) 
    {
        double a = 50.45;
        // Input double value, Output exponent of it 
        System.out.println(Math.getExponent(a));
    }
}

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Output:

Example 2

public class GetExponentExample2
{
    public static void main(String[] args) 
    {
        float a = 83.2f;
        // Input float value, Output exponent of it 
        System.out.println(Math.getExponent(a));
    }
}

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Output:

Example 3

public class GetExponentExample3
{
    public static void main(String[] args) 
    {
        double a = 1.0/0;
        // Input infinity of double type, Output (Double.MAX_EXPONENT+1)
        System.out.println(Math.getExponent(a));
    }
}

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Output:

Example 4

public class GetExponentExample4
{
    public static void main(String[] args) 
    {
        float a = 1.0f/0;
        // Input infinity of float type, Output (Float.MAX_EXPONENT+1)
        System.out.println(Math.getExponent(a));
    }
}

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Output:

Example 5

public class GetExponentExample5
{
    public static void main(String[] args) 
    {
        float a = 0.0f;
        // Input zero, Output (Float.MIN_EXPONENT-1)
        System.out.println(Math.getExponent(a));
    }
}

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Output:

-127

Example 6

public class GetExponentExample6
{
    public static void main(String[] args) 
    {
        double a = 0.0;
        // Input zero, Output (Double.MIN_EXPONENT-1)
        System.out.println(Math.getExponent(a));
    }
}

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Output: