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iOS Swift Closures Functions as First Class Citizens Higher Order Functions

Posted by Joao Rodolfo Watter Junior
Joao Rodolfo Watter Junior
Courses Plus Student 2,618 Points

When I click Check Work it doesn't recognize the name of my function.

I'm pretty sure I have no misspell on my exercise.

higherOrderFunctions.swift 
/** 
  For this code challenge, let’s define a math operation as a function that 
  carries out some work on two integers and returns an integer as well. An 
  example is the function below, `differenceBetweenNumbers`, which takes two 
  integers and calculates the difference between the numbers. After calculating, 
  it returns the difference.
*/

func differenceBetweenNumbers(a: Int, b:Int) -> (Int) {
  return a - b
}

// Enter your code below
func mathOperation (a: Int, b:Int) -> (Int) {
  return a + b
}