What is nextDown() in scala?

Overview

The nextUp() method is a static method in the math package that returns the floating point number adjacent to the first argument towards the direction of the negative infinity.

Scala internally uses Java implementations of the corresponding methods. This method internally invokes the nextDown() method in Java.

Syntax

math.nextDown(x)

Parameters

  • x: It is the starting floating point or a double number.

Return value

This method returns the nearest floating-point/double number in the direction of negative infinity adjacent to the given number.

Code example

Let’s look at the code below:

import scala.math
object Main extends App {
    val x: Double = -234
    println(s"starting point - ${x}")
    val newNum = Math.nextDown(x)
    println(s"Number adjacent to ${x} towards negative infinity - ${newNum}")
}

Code explanation

  • Line 1: We import the math package.
  • Line 4: We define the starting point x.
  • Line 5: We print x.
  • Line 6: We obtain the next value after x in the direction of negative infinity by invoking the nextUp() method. The value returned is stored in newNum.
  • Line 7: We printnewNum.

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