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Foto Graft
Courses Plus Student 2,601 PointsClosures
I think I don't understand what the question is asking. Can someone help me with this? I tried to let the function take in another function but it doesn't seem to work either.
/**
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 () -> (Int, Int) -> (Int) {
return differenceBetweenNumbers
}
3 Answers
Caleb Kleveter
Treehouse Moderator 37,862 PointsHere is a code example from the docs:
func printMathResult(mathFunction: (Int, Int) -> Int, a: Int, b: Int) {
println("Result: \(mathFunction(a, b))")
}
printMathResult(addTwoInts, 3, 5)
// prints "Result: 8"
Foto Graft
Courses Plus Student 2,601 PointsThanks! I re-read the docs and solved it! Here's mine:
func differenceBetweenNumbers(a: Int, b:Int) -> (Int) { return a - b }
// Enter your code below func mathOperation (differenceBetweenNumbers:(Int, Int) -> Int, a: Int, b: Int) -> (Int) { return differenceBetweenNumbers(a, b) }
Caleb Kleveter
Treehouse Moderator 37,862 PointsGreat! Glad you got it!