constant is a value that cannot be changed.
To declare a constant simply put the word
let name of the constant:
let player: String = "Henrik Larsson"
If we wanted to change
player = "Chris Sutton"
We would not be able to do so as constants cannot be changed. You would be presented with the error:
Cannot assign to value: 'player' is a 'let' constant.
Use constant by default and change to a variable if you want to change it. Xcode is pretty decent at warning you about this.
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