Higher Order Functions in Scala

// Scala program of higher order
// function

// Creating object
object GfG 
{
    
    // Main method
    def main(args: Array[String]) 
    {
        // Displays output by assigning 
        // value and calling functions
        println(apply(format, 32))
    
    }
    
    // A higher order function
    def apply(x: Double => String, y: Double) = x(y)

    // Defining a function for
    // the format and using a
    // method toString()
    def format[R](z: R) = "{" + z.toString() + "}"
    
}

// Scala program of higher order
// function

// Creating object
object GfG 
{
    // Main method
    def main(args: Array[String]) 
    {
    
        // Creating a list of numbers
        val num = List(7, 8, 9)
    
        // Defining a method
        def multiplyValue = (y: Int) => y * 3
    
        // Creating a higher order function 
        // that is assigned to the variable
        val result = num.map(y => multiplyValue(y))
    
        // Displays output
        println("Multiplied List is: " + result)
    }
}