How to get Maximum value of an Array

    let array = [1,5, 10, 2, 20, 9, 3]
let maximumNumber = array.reduce(Int.min, { max($0, $1)})
print(maximumNumber)

This is my code but I need the Maximum value of an Array without any predefined functions and HigherOrder Functions.

>Solution :

    func findMaxNumber(inArray : [Int]) -> Int?{
    var max = inArray.first
    if inArray.isEmpty == false{
        for i in 0..<inArray.count{
            let x = inArray[i]
            if x > max! {
                max = x
            }
        }
    }
    return max
}

Usage let maxNumber = findMaxNumber(inArray: yourIntArray)