Passing function as an argument to another function thus creating a Higher-Order Function

suggest change

func multiply2(item: Int)-> Int
{
    return (item + 2)
}

let multiply2ToMe = multiply2

// passing the function directly to the function as param
print(math.performOperation(inputArray: arrayToBeProcessed, operation: multiply2ToMe))

Output:

[3, 5, 7, 9, 11, 13, 10, 8, 6, 4, 102]

Similarly the above could be achieved using a closure

// passing the closure directly to the function as param
print(math.performOperation(inputArray: arrayToBeProcessed, operation: { $0 * 2 }))

Found a mistake? Have a question or improvement idea? Let me know.

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