What is Math.round() in Scala?

The round() function in Scala rounds a number off to the nearest integer. The image below shows a visual representation of the round() function.

Syntax

Int round(Float number)
Long round(Double number)

Parameter

number: the parameter to be rounded off.

Return value

The round() function returns the nearest integer value of a number.

If the parameter value is positive infinity, then round() returns Int.MaxValue or Log.MaxValue, accordingly.

If the parameter value is negative infinity, then round() returns Int.MinValue or Log.MinValue, accordingly.

If the parameter value is NaN, then round() returns 0.

Example

import scala.math._
object Main extends App {
    //positive number
    println(s"The value of round(11.2) = ${round(11.2)}"); 
    //zero
    println(s"The value of round(0) = ${round(0)}"); 
    //negative number
    println(s"The value of round(-10.6) = ${round(-10.6)}");
    //already integer
    println(s"The value of round(11) = ${round(11)}");
    //error outputs
    println(s"The value of round(Double.PositiveInfinity) = ${round(Double.PositiveInfinity)}");
    println(s"The value of round(Double.NegativeInfinity) = ${round(Double.NegativeInfinity)}");
    println(s"The value of round(Double.NaN) = ${round(Double.NaN)}");
    
}