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func originalStyleLongComplimentAboutBlog(blog: iOSDevelopmentBlog) {
    
    if let blogName = blog.name {
        print("The \(blogName) blog is a great iOS Development Blog!")
        
        if let blogAuthor = blog.Author {
            print("It is written by \(blogAuthor).")
            
            if let blogURL = blog.URL {
                print("Visit it at \(blogURL)")
            } else {
                print("Search for it on your favorite on your favorite search engine.")
            }
        } else {
            print("it is written by an unknown author.")
        }
    } else {
        print("I don't know the name of this blog, but it's a good one!")
    }
    
}

func guardStyleLongComplimentAboutBlog(blog: iOSDevelopmentBlog) {
    
    guard let blogName = blog.name else {
        print("I don't know the name of this blog, but it's a good one!")
        return
    }
    
    print("The \(blogName) blog is a great iOS Development Blog!")
    
    guard let blogAuthor = blog.Author else {
        print("it is written by an unknown author.")
        return
    }
    
    print("It is written by \(blogAuthor).")
    
    guard let blogURL = blog.URL else {
        print("Search for it on your favorite on your favorite search engine.")
        return
    }
    
    print("Visit it at \(blogURL)")
}

let maybeNumbers: [Int?] = [3, 7, nil, 12, 40]

for maybeValue in maybeNumbers {
    
    guard let value = maybeValue else {
        print("No Value")
        break
    }
    
    print(value)
}

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