Methods are allowed to end with question mark (?) or exclamation mark (!). By convention, methods that answer questions end with question mark and methods that indicates that method can change the state of the object end with exclamation mark.
Methods are allowed to end with question mark (?) or exclamation mark (!). By convention, methods that answer questions end with question mark and methods that indicates that method can change the state of the object end with exclamation mark.
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