Help heroes: I recently watched a video to learn Swift, but when I practiced it myself, I found that the video was a little different from the actual practice. For example, when I learned arrays and dictionaries, I found the following problems:
import Foundation
//import Cocoa
//var dict:[String:String]=["name":"jack","age":"22"]
var dict=["name":"jack","age":"22"]
print(dict)
print(dict[" name"])//Warning here: Expression implicitly coerced from 'String?' to 'Any'
The output results are also different from the video, please give me some advice
