Challenge: Write your First Higher-Order Function

Problem Statement

You need to create a higher-order function arithmeticPrinter which prints the result of an arithmetic function that has two parameters of type Int and returns a value of type Int.

In this challenge, you will assume that the following arithmetic functions have been declared:

def add(a: Int, b: Int): Int = {
  a + b
}

def subtract(a:Int, b:Int) = {
  a - b
}

def multiply(a:Int, b:Int) = {
  a * b
}

def divide(a:Int, b:Int) = {
  a / b
}

For instance, the arithmeticPrinter will take the add function as input and print its result.

Input

arithmeticPrinter has three parameters.

1. A function f which has two parameters of type Int and returns a value of type Int.
2. An integer x
3. An integer y

The input will be a function and two integers that will be passed to the function.

Output

The output will be the result of the arithmetic function.

Sample Input

add, 4, 9

Sample Output

13

Test Yourself

Write your code in the given area. Try the exercise by yourself first, but if you get stuck, the solution has been provided. Good luck!

Let’s go over the solution review in the next lesson.