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Java Math nextUp() method with Examples

Last Updated : 16 Apr, 2018

The java.lang.Math.nextUp() is a built-in math function in java which returns the floating-point value adjacent to the parameter provided in the direction of positive infinity.nextUp() method is overloaded which means that we have more than one method with the same name under the Math class.Two overloaded method of the nextUp() :

double type : nextUp(double d)
float type : nextUp(float f)

Note :

If the argument is NaN, the result is NaN.
If the argument is zero, the result is Double.MIN_VALUE if we are dealing with
double and if it’s float then the result is Float.MIN_VALUE.
If the argument is positive infinity, the result is positive infinity.

Syntax :

public static dataType nextUp(dataType g)
Parameter :
 g : an input for starting floating-point value.
Return :
The nextUp() method returns the adjacent floating-point value closer to 
 positive infinity.

Example :To show working of java.lang.Math.nextUp() method.

// Java program to demonstrate working 
// of java.lang.Math.nextUp() method 
import java.lang.Math; 
  
class Gfg { 
  
    // driver code 
    public static void main(String args[]) 
    { 
        double g = 69.19; 
  
        // Input double value, Output adjacent floating-point 
        System.out.println(Math.nextUp(g)); 
  
        float gf = 78.1f; 
  
        // Input float value, Output adjacent floating-point 
        System.out.println(Math.nextUp(gf)); 
  
        double a = 0.0 / 0; 
  
        // Input NaN, Output NaN 
        System.out.println(Math.nextUp(a)); 
  
        float b = 0.0f; 
  
        // Input zero, Output Float.MIN_VALUE for float 
        System.out.println(Math.nextUp(b)); 
  
        double c = 1.0 / 0; 
  
        // Input positive infinity, Output positive infinity 
        System.out.println(Math.nextUp(c)); 
    } 
} 

Output:

69.19000000000001
78.100006
NaN
1.4E-45
Infinity

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