public static dataType nextDown(dataType g)

// Java program to demonstrate working
// of java.lang.Math.nextDown() method
import java.lang.Math;
  
class Gfg {
  
    // driver code
    public static void main(String args[])
    {
        double g = 23.44;
  
        // Input double value, Output adjacent floating-point
        System.out.println(Math.nextDown(g));
  
        float gf = 28.1f;
  
        // Input float value, Output adjacent floating-point
        System.out.println(Math.nextDown(gf));
  
        double a = 0.0 / 0;
  
        // Input NaN, Output NaN
        System.out.println(Math.nextDown(a));
  
        float b = 0.0f;
  
        // Input zero, Output - Float.MIN_VALUE for float
        System.out.println(Math.nextDown(b));
  
        double c = -1.0 / 0;
  
        // Input negative infinity, Output negative infinity
        System.out.println(Math.nextDown(c));
    }
}

23.439999999999998
28.099998
NaN
-1.4E-45
-Infinity