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# no clue as to why my code wont work!!

it works alright in xcode is there something in the challenge i am missing out? THE QUESTION : In the editor, define a function, named largest, with a generic type parameter, T. The function takes an array of type T as its first argument. Give this argument an external name of in. The return type of the function is optional T. Given an array the function should return the largest value in the array. For example, calling largest(in: [1,2,3]) should return 3. To make this work, you'll need to constrain the generic type T to conform to Comparable.

MYCODE: ```func largest<T: Comparable>( in inn: [T] ) -> T? {

```var large: T? = 0 as? T

for var i in 0...inn.count-1 {
if inn[i] > large! {
large = inn[i]
i += 1
}
}

guard let value = large else {fatalError()}
return value
```

}

largest(in: [1,2,3,4])```

generics.swift
```func largest<T: Comparable>( in inn: [T] ) -> T? {

var large: T? = 0 as? T

for var i in 0...inn.count-1 {
if inn[i] > large! {
large = inn[i]
i += 1
}
}

guard let value = large else {fatalError()}
return value

}

largest(in: [1,2,3,4])
```

## 2 Answers

This should help you

```func largest<T: Comparable>(in array: [T]) -> T? {
var largest: T?

if let largestNum = array.max() {
largest = largestNum
} else {
return nil
}

return largest
}
```
```func largest<T:Comparable>(in array: [T]) -> T? {
return array.max()
}
```

Check this out!