Variable parameter: variable parameter

Variable parameter: variable parameter.

Format: Method name (parameter type ... Name of the parameter)

When a function is defined with a mutable parameter, the function can pass in multiple actual arguments of the type at a time when it is called.
The definition of a mutable parameter organizes these actual arguments into an array at execution time, and the parameter names of the mutable parameters are the arrays.

mutable arguments and array types cannot be overloaded, because they are essentially the same
Variable parameters must be placed in the last

Variable parameter: variable parameter